Day 8

• What we will do today…

2/2/12 Starter – HomeworkDirection: Copy the following questions and answer

choices. Match the correct answer choice with its question (s). You might use the terms twice.

1. A balance is used to measure A. distance2. A meter stick is used to measure B. mass3. A thermometer is used to measure C. volume (s)4. A graduated cylinder is used to measure D. density5. The unit for mass is E. gram6. 637 cm is F.

temperature7. 603 mL G. volume (l)8. 3.6 g/mL9. 6.94 g10.379 cm3

Review:

Direction: Copy and Answer the following questions.

1.Solve for x: 2x+3=02.What is #1 an equation or formula?3.Solve for I: V=I(R)4.What is #3 an equation or formula?5.Solve for w: V=L(W)(H)

InvestigationMini-Investigation Speed

Why do this Lab?Many students have an understanding of what speed is. But they have little knowledge on how to measure and calculate speed. You will learn how to measure speed with this lab.

Procedure

You will get an object from your teacher. Using your Past experience with the object you just received from your teacher mark out a straight-line track on your table using tape.

1. On your table using a piece of tape make the starting line and the finish line. 2. Using a ruler measure the distance of your track. Record your distance on your

own paper.3. Have someone place your object at the starting line. 4. Have someone to take the time the object travels. 5. Push the object down the track. As you push the object down the track someone

should record the time it takes to travel from the starting line to finish line.6. Record your time beside the distance of the track on your own paper.

Reading Passage: Speed

• Speed can be calculated by dividing the distance and object travels by the time it takes to cover the distance. The formula for finding speed is

• Speed=distance s=d• time t• The standard unit for speed is meters per

second (m/s). Speed is also given in kilometers per hour (km/h).

Practice Problems: Speed

• Directions: Identify what you know in the following word problems.

A toad jumped 3 kilometer in 1 hour, then jumped 1 kilometer in 2 hours, it rested for 1 hour, and then jumped 5 kilometer in 2 hours. What was the toad’s average speed?

Practice Problems: Speed

• Directions: Identify what you know in the following word problems.

If a frog jumps a distance of 3 meters in 6 seconds, what is its speed?

Practice Problems: Speed

• Directions: Identify what you know in the following word problems.

A runner completed the 100.-meter dash in 10.0 seconds. Her average speed is?

Practice Problems: Speed • Directions: Copy the following word problems and

Identify what you know in the following word problems.

1.What is the speed of a car that travels 180 km in 1.5 hours?

2.What is the average speed of a dog cart that travels 2 kilometer in the first 30 min., 0.5 kilometer in the next hour and 3 kilometer in 30 min.?

3. If a car has a constant speed traveling 80 meters in 5.5 hours, how fast is the car traveling?

4. If you walk at a constant speed traveling 2 kilometer in 18.8 minutes, how fast are you walking?

5. If a lion runs 40 kilometers in 120 min, how fast will he travel?

Practice Problems: Speed

• Directions: Identify what you are solving for in the following word problems.

A toad jumped 3 kilometer in 1 hour, then jumped 1 kilometer in 2 hours, it rested for 1 hour, and then jumped 5 kilometerm in 2 hours. What was the toad’s average speed?

Practice Problems: Speed

• Directions: Identify what you are solving for in the following word problems.

If a frog jumps a distance of 3 meters in 6 seconds, what is its speed?

Practice Problems: Speed

• Directions: Identify what you are solving for in the following word problems.

A runner completed the 100.-meter dash in 10.0 seconds. Her average speed is?

Practice Problems: Speed • Directions: Identify what you are solving for in the

following equations.

1.What is the speed of a car that travels 180 km in 1.5 hours?

2. What is the average speed of a dog cart that travels 2 kilometer in the first 30 min., 0.5 kilometer in the next hour and 3 kilometer in 30 min.?

3. If a car has a constant speed traveling 80 meters in 5.5 hours, how fast is the car traveling?

4. If you walk at a constant speed traveling 2 kilometer in 18.8 minutes, how fast are you walking?

5. If a lion runs 40 kilometers in 120 min, how fast will he travel?

KWFL

• K stands for what you know.• W stands for what you need/want to know.• F stands for what equation you will use.• L stands for what you learned.

KWFL CHART

K W F L

Speed: Class KWFL

• Directions: Using the word problem, complete a KWFL. (using poster paper)

• While traveling on vacation, you measure the times and distances traveled. You travel 35 kilometers in 0.5 hours, followed by 53 kilometers in 0.5 hours. What is the average speed?

Exit Slip: On a Sticky Note

• Directions: Identify what you know and what you are solving for using the following word problem.

A spider crawls on a wall. First it crawls 1 meter up, then 1 meter to the left, and 1 meter down in 3 minutes. How fast does the spider crawl?