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9th grade Fizx
Unit-1 Nature ofPhysics
1.1 The Science of Physicspage - 19
Solutions
condensed matter physics
nuclear physics
9th grade Fizx
Unit-1 Nature ofPhysics
1.1 The Science of Physicspage - 19
Solutions
thermodynamics
electricity & magnetism
optics
mechanics
optics
9th grade Fizx
Unit-1 Nature ofPhysics
1.1 The Science of Physicspage - 19
Solutions
electricity & magnetism mechanics
mechanics nuclear physics
9th grade Fizx
Unit-1 Nature ofPhysics
1.2 Scientific Methodpage - 24
Solutions
The scientist writes in a notebook, "It appears that salt water freezes at a lower temperature than fresh water." The scientist continues, "I suggest that the reason sea water freezes at a lower temperature is that sea water contains dissolved salts, while fresh water does not."
"If sea water has salt in it, it will freeze at a lower temperature than fresh water."
9th Grade Physics Workbook METU Development Foundation High School 5
4. Read the following paragraph and answer the following questions. A scientist wants to find out why seawater freezes at a lower temperature than fresh water. The scientist goes to the library and reads a number of articles about the physical properties of solutions. The scientist also reads about the composition of seawater. The scientist travels to a nearby beach and observes the conditions there. The scientist notes the taste of seawater and other factors such as waves, wind, air pressure, temperature, and humidity. After considering all this information, the scientist sits at a desk and writes, "If sea water has salt in it, it will freeze at a lower temperature than fresh water." The scientist goes the laboratory and does the following: a. Fills each of two beakers with one liter of fresh
water, b. Dissolves 35 grams of table salt in one of the
beakers, c. Places both beakers in a freezer at a
temperature of -1 °C, d. Leaves the beakers in a freezer for 24 hours. After 24 hours, the scientist examines both beakers and finds the fresh water to be frozen. The salt water is still a liquid. The scientist writes in a notebook, "It appears that salt water freezes at a lower temperature than fresh water." The scientist continues, "I suggest that the reason sea water freezes at a lower temperature is that sea water contains dissolved salts, while fresh water does not." a) Which statement(s) contains conclusions? b) Which statement(s) contains a hypothesis? c) Which statement(s) contains observations? d) Which statement(s) describes an experiment? e) In which statement is the problem described?
5. Match the part of the experiment (1…6) with the statements by placing the printed number of the BEST answer on the line. All parts should be used and some parts may be used more than once.
Conclusion (1)
Data & Observations
(2)
Experiment (3)
Hypothesis (4)
Problem (5)
Research (6)
_____ A scientist wants to know: “Does the
temperature of water change how much sugar will dissolve in it?”
_____ He looks up facts about sugar to see how well it dissolves in water, and if there are any special procedures for dissolving sugar in water.
_____ He decides that more sugar will dissolve in the water if it is hotter.
_____ He prepares five different beakers of water at different temperatures.
_____ He adds sugar to each of the beakers until no more will dissolve.
_____ He then carefully measures and records how much sugar was added to each beaker.
_____ He makes sure that each beaker has the same amount of water in it. He stirs the beakers in the same way, at the same speed for the same amount of time then he states that temperature of water is directly proportional to the amount of dissolving of sugar.
In the experiment described above; a) What is the independent variable? b) What is the dependent variable? c) What is the controlled variable?
The scientist notes the taste of seawater and other factors such as waves, wind, air pressure, temperature, and humidity.
9th Grade Physics Workbook METU Development Foundation High School 5
4. Read the following paragraph and answer the following questions. A scientist wants to find out why seawater freezes at a lower temperature than fresh water. The scientist goes to the library and reads a number of articles about the physical properties of solutions. The scientist also reads about the composition of seawater. The scientist travels to a nearby beach and observes the conditions there. The scientist notes the taste of seawater and other factors such as waves, wind, air pressure, temperature, and humidity. After considering all this information, the scientist sits at a desk and writes, "If sea water has salt in it, it will freeze at a lower temperature than fresh water." The scientist goes the laboratory and does the following: a. Fills each of two beakers with one liter of fresh
water, b. Dissolves 35 grams of table salt in one of the
beakers, c. Places both beakers in a freezer at a
temperature of -1 °C, d. Leaves the beakers in a freezer for 24 hours. After 24 hours, the scientist examines both beakers and finds the fresh water to be frozen. The salt water is still a liquid. The scientist writes in a notebook, "It appears that salt water freezes at a lower temperature than fresh water." The scientist continues, "I suggest that the reason sea water freezes at a lower temperature is that sea water contains dissolved salts, while fresh water does not." a) Which statement(s) contains conclusions? b) Which statement(s) contains a hypothesis? c) Which statement(s) contains observations? d) Which statement(s) describes an experiment? e) In which statement is the problem described?
5. Match the part of the experiment (1…6) with the statements by placing the printed number of the BEST answer on the line. All parts should be used and some parts may be used more than once.
Conclusion (1)
Data & Observations
(2)
Experiment (3)
Hypothesis (4)
Problem (5)
Research (6)
_____ A scientist wants to know: “Does the
temperature of water change how much sugar will dissolve in it?”
_____ He looks up facts about sugar to see how well it dissolves in water, and if there are any special procedures for dissolving sugar in water.
_____ He decides that more sugar will dissolve in the water if it is hotter.
_____ He prepares five different beakers of water at different temperatures.
_____ He adds sugar to each of the beakers until no more will dissolve.
_____ He then carefully measures and records how much sugar was added to each beaker.
_____ He makes sure that each beaker has the same amount of water in it. He stirs the beakers in the same way, at the same speed for the same amount of time then he states that temperature of water is directly proportional to the amount of dissolving of sugar.
In the experiment described above; a) What is the independent variable? b) What is the dependent variable? c) What is the controlled variable?
The scientist goes the laboratory and does the following:
a. Fills each of two beakers with one liter of fresh water,
b. Dissolves 35 grams of table salt in one of the beakers,
c. Places both beakers in a freezer at a temperature of -1 °C,
d. Leaves the beakers in a freezer for 24 hours.
9th Grade Physics Workbook METU Development Foundation High School 5
4. Read the following paragraph and answer the following questions. A scientist wants to find out why seawater freezes at a lower temperature than fresh water. The scientist goes to the library and reads a number of articles about the physical properties of solutions. The scientist also reads about the composition of seawater. The scientist travels to a nearby beach and observes the conditions there. The scientist notes the taste of seawater and other factors such as waves, wind, air pressure, temperature, and humidity. After considering all this information, the scientist sits at a desk and writes, "If sea water has salt in it, it will freeze at a lower temperature than fresh water." The scientist goes the laboratory and does the following: a. Fills each of two beakers with one liter of fresh
water, b. Dissolves 35 grams of table salt in one of the
beakers, c. Places both beakers in a freezer at a
temperature of -1 °C, d. Leaves the beakers in a freezer for 24 hours. After 24 hours, the scientist examines both beakers and finds the fresh water to be frozen. The salt water is still a liquid. The scientist writes in a notebook, "It appears that salt water freezes at a lower temperature than fresh water." The scientist continues, "I suggest that the reason sea water freezes at a lower temperature is that sea water contains dissolved salts, while fresh water does not." a) Which statement(s) contains conclusions? b) Which statement(s) contains a hypothesis? c) Which statement(s) contains observations? d) Which statement(s) describes an experiment? e) In which statement is the problem described?
5. Match the part of the experiment (1…6) with the statements by placing the printed number of the BEST answer on the line. All parts should be used and some parts may be used more than once.
Conclusion (1)
Data & Observations
(2)
Experiment (3)
Hypothesis (4)
Problem (5)
Research (6)
_____ A scientist wants to know: “Does the
temperature of water change how much sugar will dissolve in it?”
_____ He looks up facts about sugar to see how well it dissolves in water, and if there are any special procedures for dissolving sugar in water.
_____ He decides that more sugar will dissolve in the water if it is hotter.
_____ He prepares five different beakers of water at different temperatures.
_____ He adds sugar to each of the beakers until no more will dissolve.
_____ He then carefully measures and records how much sugar was added to each beaker.
_____ He makes sure that each beaker has the same amount of water in it. He stirs the beakers in the same way, at the same speed for the same amount of time then he states that temperature of water is directly proportional to the amount of dissolving of sugar.
In the experiment described above; a) What is the independent variable? b) What is the dependent variable? c) What is the controlled variable?
A scientist wants to find out why seawater freezes at a lower temperature than fresh water.
9th grade Fizx
Unit-1 Nature ofPhysics
1.2 Scientific Methodpage - 24
Solutions
5
6
4
3
3
2
1
Water at different temperatures.
Amount of sugar that will dissolve in the water.
The amount of water.
9th grade Fizx
Unit-1 Nature ofPhysics
1.2 Scientific Methodpage - 27
Solutions
9th Grade Physics Workbook METU Development Foundation High School 6
1.2 SCIENTIFIC METHOD Activity – 1.2.2
Observation & Experiment (Variables) 1. Determine the following statements whether they are qualitative or quantitative observations If it is QUALITATIVE, print “QL”. If it is QUANTITATIVE, print “QN”.
______ a) Your cell phone rang for 6 times.
______ b) I bought 4kg of tomatoes yesterday.
______ c) The wind is blowing very strong due southwest.
______ d) There are 20 minutes left to the end of this exam.
______ e) Classroom is really cold today. 2. Read the following examples and then decide if each is either qualitative (QL) or quantitative (QN). _______ a) The candy was sour. _______ b) The wing of the bug is 5 cm long. _______ c) That iPod is white. _______ d) The mass of the beaker was 122 g. _______ e) The door chime rings several times.
3. Choose the best answer and encircle its letter. a) Mr. Erkoç Torun wanted to see how different
types of music affected students' pulse rates. He played different types of music: heavy metal, rap, R&B, alternative, pop, country, and classical music.
Identify the dependent variable. A) Classical music resulted in the highest pulse
rate. B) Mr. Erkoç Torun. C) Types of music. D) High pulse rate. E) Pulse rate. b) Zeynep wanted to see how high an ice cube
would float in different temperatures of water. Identify the independent variable. A) Size of ice cube. B) Temperature the ice cube was at its' highest
height. C) Temperature of water. D) Amount of water. E) Height of ice cube. c) Duygu was investing how fast it took Efecan to
react to different sounds. Identify the dependent variable. A) How much time it took Efecan to react. B) How fast the sounds are played. C) Playing the trumpet over and over. D) Efecan. E) Different sounds. d) Arda studied how far water would spurt out of
a plastic milk carton when holes were punched at different heights from the bottom of the container.
Identify the controlled variable. A) Distance water traveled out of carton. B) Water. C) Sizes of holes. D) Different heights of holes in container. E) The total height of the container. e) Problem: Do cars using diesel fuel get more
distance than cars using gas? Identify the independent variable. A) distance traveled. B) type of fuel. C) car model. D) amount of fuel. E) driver.
QN
QN
QL
QN
QL
9th grade Fizx
Unit-1 Nature ofPhysics
1.2 Scientific Methodpage - 28
Solutions
What is the effectiveness of various metals in preventing rusting?
If we place various metals into water, metals will rust in different amounts.
The types of metals.
How much the nails rusted.
Amount of water in the tubes, amount of metals, and the same type of iron nail.
4.
9th grade Fizx
Unit-1 Nature ofPhysics
1.2 Scientific Methodpage - 28
Solutions
How does the mass of the toy car released from the top of the ramp affect the distance traveled by the car after it reaches the bottom of the ramp?
The mass of the toy car cannot have any effect on the horizontal distance that the car travels until it stops.
The mass of the toy car.
The horizontal distance traveled by the car until it stops.
The height of the ramp.
5.
9th grade Fizx
Unit-1 Nature ofPhysics
1.4 Measurement & Units page - 43
Solutions
basic
basic
basic
basic
derived
derived
basic
basic
derived
derived
derived
derived
9th grade Fizx
Unit-1 Nature ofPhysics
1.4 Measurement & Units page - 43
Solutions
Mass
Time
Length
ampere
kelvin
9th grade Fizx
Unit-1 Nature ofPhysics
1.4 Measurement & Units page - 43
Solutions
420000
10
0,07
560000
1,88.109
0,00043
103
9th grade Fizx
Unit-1 Nature ofPhysics
1.4 Measurement & Units page - 44
Solutions
poor accuracy & good precision
good accuracy & good precision
poor accuracy & poor precision
9th grade Fizx
Unit-1 Nature ofPhysics
1.4 Measurement & Units page - 44
Solutions
Absolute error = 10,22-10,00=0,22 g
Percent error =(0,22/10,00).100
Percent error =2,2 %
9th grade Fizx
Unit-1 Nature ofPhysics
1.4 Measurement & Units page - 45
Solutions
scalar
scalar
scalar
scalar
vector
vector
vector
9th grade Fizx
Unit-1 Nature ofPhysics
1.4 Measurement & Units page - 45
Solutions
scalar
scalar
scalar
scalar
vector
vector
9th grade Fizx
Unit-1 Nature ofPhysics
1.4 Measurement & Units page - 45
Solutions
equal to
opposite
equal
line of action
perpendicular
zero