category 2 test

Category 2 Test

1 The graph shows the movement of a car over time. What is the car’s average speed?

F 10 kilometers per hourG 15 kilometers per hourH 30 kilometers per hourJ 60 kilometers per hour

2 Which of the following devices converts chemical energy to light

energy?

A C

Wind turbines Flashlight

B D

Electric Lamp Solar cells

3 Diesel fuel is used in the engines of the machines and trucks at the quarry. Which of these is the main energy transformation as the fuel is used by the engines?

F Electrical energy is converted to heat energy.G Heat energy is converted to potential energy.H Electrical energy is converted to kinetic energy.J Chemical energy is converted to kinetic energy.

4 Which energy transformation occurs when a match is lit?

F Chemical energy to heat energyG Heat energy to potential energyH Electrical energy to heat energyJ Kinetic energy to potential energy

5 The picture shows a lima bean seedling as the root starts to grow

into the soil. The root tip is able to push through the soil because it acts as a —

A wheelB pulleyC gearD wedge

6 When the human heart contracts, it pumps blood to other parts of the body. When the heart contracts, the blood moves because the —

A pressure in the heart increasesB temperature of the blood increasesC density of the blood increasesD size of the heart increases

7 The diagram above shows a barrel moving toward a waterfall. The

barrel will have the greatest potential energy at which of these locations?

A WB XC YD Z

8 Which of the following best represents stored potential energy?

F Air leaking from a flat tireG Stress built up in a rock faultH Heat given off by a forest fireJ Water flowing through a hose

9 At which point on the roller coaster will the car have the greatest amount of kinetic energy?

F WG XH YJ Z

10 If a force is applied for 15 seconds, in which situation will the box be moved the greatest distance?

Javelina

11 Javelinas need strong leg muscles to help provide enough force for them to accelerate to high speeds. This fast movement can helpjavelinas escape from predators and reach the safety of the pack. If a javelina runs 42 m in 6 s, what is its average speed?

A 6 m/sB 7 m/sC 48 m/sD 252 m/s

12. Examine the image provided. Which statement describes a condition that would cause the car to move forward?

A The force of the engine is less than the force of friction. B The pulling force is greater than the force pushing on the car. C The pushing force is less than the force pulling on the car. D The force of the engine is greater than the force of friction

13. Which of the following objects would have the greatest acceleration if they each have 15 N of force acting upon it?

A 5g ball B 10g rock C 50g orange D 100g book