Net Force
Two people are pushing a box from opposite sides. One pushes with 10 N to the right, and the other pushes with 4 N to the left. What is the net force on the box?
A. 6 N to the right
B. 6 N to the left
C. 14 N to the right
D. 14 N to the left
A. 6 N to the right
How far away is the Sun from Earth?
The Sun is about 93 million miles away from Earth
What are the 3 States of Matter?
Solid, liquid, and gas
When you see an object change its position, what does that mean?
A. It is in motion
B. It is at rest
C. It has stopped moving
D. It is getting heavier
A. It is in motion
. Which animal is known for changing its color to blend in with its surroundings?
A. Chameleon
B. Tiger
C. Frog
D. Zebra
A. Chameleon
If the net force on an object is zero, what can you say about its motion?
A. It must be moving
B. It must be at rest
C. It is either at rest or moving at a constant speed
D. It will speed up
C. It is either at rest or moving at a constant speed
Which type of star(s) is the largest?
Red supergiants
List the 3 States of Matter and give an example of each.
Solid - a rock
Liquid - water
Gas - helium
Which of the following is an example of potential energy?
A. A ball rolling down a hill
B. A stretched rubber band
C. A car driving on the road
D. Water flowing in a river
B. A stretched rubber band
Potential energy is stored energy
What do mammals have that reptiles do not?
A. Feathers
B. Scales
C. Fur or hair
D. Gills
C. Fur or hair
A sled is pushed with 20 N to the right, but friction pushes it 5 N to the left. What is the net force on the sled?
A. 5 N to the right
B. 15 N to the right
C. 25 N to the right
D. 15 N to the left
B. 15 N to the right
Where are stars formed?
All stars form in a star nursery from the gravitational collapse of a stellar nebula, a giant cloud made of gas and dust
How can ice (a solid) turn into a liquid?
By melting it! When ice melts, it turns to water, which is a liquid.
If a soccer ball keeps rolling until friction slows it down, what force is acting on it?
A. Gravity
B. Magnetism
C. Friction
D. Air pressure
C. Friction
What is the largest animal in the world?
A. Elephant
B. Great white shark
C. Blue whale
D. Giraffe
C. Blue Whale
Why does an object accelerate when a net force is applied to it?
A. Because of friction
B. Because force changes the object’s motion
C. Because it has mass
D. Because it is heavy
B. Because force changes the object's motion
What color of a star is the coolest or lowest in temperature?
When ice melts into water, what happens to the particles?
A. They stop moving
B. They move faster and spread out
C. They slow down and get closer together
D. They stay the same
B. They move faster and spread out
A car travels 120 kilometers in 3 hours. What is the car’s speed? Hint: Speed = distance ÷ time
A. 30 km/h
B. 40 km/h
C. 60 km/h
D. 90 km/h
B. 40 km/h
Why do whales and dolphins need to come to the surface of the water?
A. To rest their fins
B. To warm up
C. To breathe air through their blowholes
D. To find food
C. To breathe air through their blowholes
A box is being pushed 8 N to the right and 3 N to the left. What is the net force on the box?
A. 5 N to the right
B. 11 N to the right
C. 5 N to the left
D. 11 N to the left
A. 5 N to the right
What factors determine a star's life cycle?
Hydrogen gas and mass
What happens to the particles in a gas compared to a solid?
The particles of a gas move quickly and are far apart.
The particles of a solid are tightly packed together.
A car travels 180 kilometers in the first 3 hours and then 120 kilometers in the next 2 hours. What is the car’s average speed for the entire trip?
A. 50 km/h
B. 60 km/h
C. 70 km/h
D. 75 km/h
B. 60 km/h
Total distance = 180 + 120 = 300 km
Total time = 3 + 2 = 5 hours
Average speed = total distance ÷ total time → 300 ÷ 5 = 60 km/h
Why do birds have hollow bones?
A. To store extra air for flying
B. To make their bodies lighter so they can fly
C. To hold more blood
D. To keep them warm
B. To make their bodies lighter so they can fly