Inspire Science Chapter 1 Lesson 1 Vocabulary

This is a change in an object's position.

An example is when a ball rolls from one side of the classroom to the other.

(a)  

This describes how fast an object's position changes over time.

A car's speedometer will measure this.

(a)  

This describes the speed and direction of an object.

For example, think of an airplane that is flying northwest at 900 km/h.

(a)  

When a moving object speeds up, slows down, or changes direction, it accelerates. A change in velocity over time is called (a)   .

For example, this toy car moves down the ramp quickly and speeds up.

This word describes any push or pull.

For example, when you kick a soccer ball, there is a (a)   from your leg that pushes the ball forward.

This is the tendency of an object in motion to stay in motion, or an object at rest to stay at rest.

For example, when you're the driver of a car. If the car suddenly stops, your body continues to move forward.

(a)  

This is a force between surfaces that slows objects or stops them from moving.

For example, if you go hiking on a rocky trail, it is good to wear hiking boots. The extra (a)   between your boots and the trail will prevent you from falling.

What are two factors that affect the acceleration of an object?

• force

• weight

• velocity

• speed

• inertia

Which of the following situations is an example of balanced forces?

• A soccer ball slowing down after being kicked across the field.

• A car accelerating as it goes downhill.

• A book resting on a table without moving.

• A skateboard rolling faster when pushed.

• A balloon rising quickly into the air.

Which of the following situations is an example of unbalanced forces?

• A cup sitting on a table without moving.

• A runner sprinting faster as they approach the finish line.

• A chair resting on the floor in the same position all day.

• A hanging picture frame that stays perfectly still on the wall.

• A car parked in a garage overnight.