SCIENCE Q3 PERIODIC EXAM REVIEWER

 SCIENCE Q3 PERIODIC EXAM REVIEWER

Test I. Direction: Encircle the letter of the correct answer.

1) What is the force that resists the motion of an object when it is in contact with a surface?

A) Gravity

B) Friction

C) Velocity

D) Acceleration

 

2) What happens to the weight of an object when it is taken to a location with a stronger gravitational pull?

A) It decreases

B) It increases

C) It remains the same

D) It becomes zero

 

3) Which type of friction occurs when an object is moving through a fluid, like air or water?

A) Static friction

B) Rolling friction

C) Sliding friction

D) Fluid friction

 

4) When an object is on a flat surface and at rest, what is the direction of the force of friction acting on it?

A) Upwards

B) Downwards

C) Towards the surface

D) Perpendicular to the surface

 

5) What is the relationship between friction and the motion of an object?

A) Friction always causes an object to slow down

B) Friction always causes an object to speed up

C) Friction can either speed up or slow down an object, depending on the situation

D) Friction has no effect on the motion of an object

 

6) What is the process called when energy changes from one form to another?

A) Conversion

B) Transition

C) Transmission

D) Transformation

 

7) What is the form of energy associated with motion?

A) Kinetic energy

B) Potential energy

C) Thermal energy

D) Chemical energy

 

8) What is the form of energy that is stored in an object due to its position or shape?

A) Kinetic energy

B) Potential energy

C) Thermal energy

D) Chemical energy

  

9) What is the term used to describe the total amount of energy in a system that is available to do work?

A) Kinetic energy

B) Potential energy

C) Thermal energy

D) Mechanical energy

 

10) What is the term used to describe the process of converting sunlight into energy that can be used by living organisms?

A) Photosynthesis

B) Cellular respiration

C) Digestion

D) Fermentation

 

11) Which simple machine is used to raise or lower a load?

A) Lever

B) Pulley

C) Inclined plane

D) Wheel and axle

 

12) Which simple machine consists of a sloping surface that reduces the amount of force needed to move an object?

A) Screw

B) Wedge

C) Lever

D) Inclined plane

 

13) Which simple machine consists of a bar that is supported at a fixed point and used to move a load with less force?

A) Lever

B) Pulley

C) Screw

D) Inclined plane

 

14) Which simple machine consists of two circular objects of different sizes that rotate together to move a load?

A) Screw

B) Wedge

C) Lever

D) Wheel and axle

 

15) Which simple machine consists of an inclined plane that is wrapped around a cylinder?

A) Screw

B) Wedge

C) Lever

D) Pulley

 

16) Which of the following is an example of frictional force?

A) A ball rolling down a hill

B) A car accelerating on a flat road

C) A boat floating on a calm lake

D) A sled sliding down a snowy hill

 

17) How does the force of friction change when the surface becomes rougher?

A) It decreases

B) It increases

C) It stays the same

D) It becomes zero

 

 

18) What type of friction occurs when an object moves through a liquid or gas?

A) Static friction

B) Rolling friction

C) Sliding friction

D) Fluid friction

 

19) What is the law of conservation of energy?

A) Energy cannot be created or destroyed, only transformed from one form to another

B) Energy can be created but cannot be destroyed or transformed

C) Energy can be destroyed but not created or transformed

D) Energy can be transformed but not created or destroyed

 

20) What type of energy is stored in the bonds between atoms and molecules?

A) Kinetic energy

B) Potential energy

C) Thermal energy

D) Chemical energy

 

21) How does the potential energy of an object change as it is lifted higher off the ground?

A) It increases

B) It decreases

C) It stays the same

D) It becomes zero

 

22) What is the relationship between work and energy?

A) Work is a measure of energy

B) Energy is a measure of work

C) Work and energy are not related

D) Work and energy are the same thing

 

23) What type of energy is associated with the motion of molecules?

A) Thermal energy

B) Kinetic energy

C) Chemical energy

D) Nuclear energy

 

24) How does an inclined plane make work easier?

A) By increasing the distance over which the force is applied

B) By decreasing the distance over which the force is applied

C) By increasing the amount of force applied

D) By decreasing the amount of force applied

 

25) How does a pulley make work easier?

A) By increasing the distance over which the force is applied

B) By decreasing the distance over which the force is applied

C) By increasing the amount of force applied

D) By decreasing the amount of force applied

 

26) A car is moving on a flat road at a constant speed. Which of the following forces is acting on the car?

A) Gravitational force only

B) Frictional force only

C) Both gravitational and frictional forces

D) Neither gravitational nor frictional forces

  

27) An object is being pulled to the right with a force of 20 N and to the left with a force of 30 N. Which direction will the object move?

A) To the right with a net force of 10 N

B) To the left with a net force of 10 N

C) To the left with a net force of 20 N

D) To the right with a net force of 50 N

 

28) ball is thrown straight up in the air. At what point in its path does the ball experience zero velocity and maximum acceleration due to gravity?

A) At the highest point of its path

B) At the start of its path

C) At the end of its path

D) Throughout its path

 

29) What happens to the mechanical energy of a moving car as it comes to a stop?

A) It is destroyed

B) It is transformed into thermal energy

C) It is transformed into potential energy

D) It remains constant

 

30) How does the efficiency of an energy conversion system change if energy is lost as heat during the conversion process?

A) It increases

B) It decreases

C) It stays the same

D) It becomes zero

 

31) What type of energy is associated with the movement of electrons?

A) Thermal energy

B) Kinetic energy

C) Electrical energy

D) Chemical energy

 

32) How does the kinetic energy of an object change as its velocity increases?

A) It decreases

B) It stays the same

C) It increases

D) It becomes zero

 

33) A light bulb converts electrical energy to what other form of energy?

A) Thermal energy

B) Chemical energy

C) Potential energy

D) Mechanical energy

 

34) How does the mechanical advantage of a lever change if the distance between the fulcrum and the point where force is applied decreases?

A) It increases

B) It decreases

C) It stays the same

D) It becomes zero

 

35) How does the mechanical advantage of a pulley change if the number of supporting ropes increases?

A) It increases

B) It decreases

C) It stays the same

D) It becomes zero

 

 

36. An object with a mass of 10 kg is sliding across a surface with a coefficient of friction of 0.5. What is the force of friction acting on the object?

A) 5 N

B) 10 N

C) 50 N

D) 100 N

 

37) A toaster uses electrical energy to transform bread into toast. This is an example of:

A) Nuclear energy

B) Thermal energy

C) Chemical energy

D) Radiant energy

 

38) A light bulb is powered by a battery. As the light bulb produces light, what happens to the battery's chemical energy?

A) It is transformed into electrical energy

B) It is transformed into radiant energy

C) It is transformed into thermal energy

D) It remains unchanged

 

39) A rollercoaster at the top of a hill has a large amount of potential energy. As it travels down the hill, what type of energy is it transformed into?

A) Kinetic energy

B) Radiant energy

C) Chemical energy

D) Nuclear energy

 

40) A student needs to lift a heavy box onto a shelf that is too high for them to reach. Which simple machine could help the student lift the box?

A) Lever

B) Pulley

C) Wheel and axle

D) Inclined plane

 

 

41) Which of the following is the most effective way to reduce friction in a system?

a) Increase the weight of the object

b) Increase the surface area of the object

c) Decrease the weight of the object

d) Decrease the surface area of the object

 

42) Which of the following energy sources is the most sustainable in the long term?

a) Fossil fuels

b) Nuclear power

c) Solar power

d) Hydroelectric power

 

43) Which of the following is the most efficient method for converting potential energy to kinetic energy?

a) A rollercoaster climbing a hill

b) A car accelerating from a stop

c) A ball rolling down a ramp

d) A pendulum swinging back and forth

 

44) Which of the following energy conversions is the most efficient?

a) Electrical energy to mechanical energy

b) Thermal energy to electrical energy

c) Mechanical energy to thermal energy

d) Chemical energy to electrical energy

 

45) Which of the following simple machines would be most effective for lifting a heavy object?

a) Inclined plane

b) Lever

c) Pulley

d) Wedge

 

46) Design an experiment to determine the effect of surface area on the amount of friction between two surfaces. Which of the following is the most appropriate variable to manipulate in this experiment?

a) The weight of the object

b) The texture of the surfaces

c) The surface area of the object

d) The speed of the object

 

47) Design a system that converts wind energy into electrical energy. Which of the following components is essential to this system?

a) A turbine

b) A battery

c) A generator

d) A resistor

 

48) Design a device that converts mechanical energy into thermal energy. Which of the following materials would be the most effective for this device?

a) Copper

b) Aluminum

c) Steel

d) Plastic

 

49) Design a machine that uses simple machines to lift a heavy object. Which of the following simple machines would be the most effective for this task?

a) Wheel and axle

b) Lever

c) Wedge

d) Pulley

 

50) Design a system that uses a pulley to lift a heavy object. Which of the following factors would have the greatest effect on the amount of force required to lift the object?

a) The weight of the object

b) The length of the rope

c) The number of pulleys used

d) The angle of the rope

CHECK YOUR ANSWER