Grade 7 Quiz Bee

Which of the following statements is true about forces?

• Forces always result in motion

• Forces can only be measured in kilograms

• Forces can act over a distance, such as gravitational forces

• Forces only exist when objects are touching each other

Which of the following is an example of a force that can act without physical contact?

• Friction

• Gravitational force

• Normal force

• Tension

An object moves in a circle with constant speed. What can we say about its velocity?

• The velocity remains constant

• The velocity is zero

• The velocity is changing due to direction change

• The velocity and speed are the same

When a metal rod is heated at one end, why does the other end eventually become hot?

• The air around the rod heats up first

• Heat travels through empty space

• The metal absorbs heat from light

• Particles vibrate and transfer energy through the rod

If you walk 5 meters east and then 5 meters west back to your starting point, what is your total distance traveled?

• 0 meters

• 5 meters

• 10 meters

• 15 meters

Which scenario demonstrates balanced forces?

• A car accelerating down a hill

• A ball thrown upwards

• A book at rest on a table

• A box sliding across the floor

When two objects at different temperatures are placed in contact, heat flows:

• From both objects equally

• From cold to hot

• Not at all

• From hot to cold

Why do metals generally conduct heat better than non-metals?

• They have free electrons that transfer energy

• They have a lower density

• They are always colder

• They reflect more heat

Which statement about heat and temperature is correct?

• Heat and temperature are identical

• Heat flows from cold to hot objects

• Temperature is measured in joules

• Heat is energy transfer between objects

What does a horizontal line on a distance-time graph indicate?

• The object is not moving

• The object is accelerating

• The object is moving at constant speed

• The object is moving backwards