Exploring Matter and Motion Concepts

Which of the following is a chemical change?

• Melting ice

• Burning wood

• Tearing paper

• Dissolving sugar in water

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Calculate the average speed of a car that travels 150 kilometers in 3 hours.

• 30 km/h

• 50 km/h

• 60 km/h

• 75 km/h

Which of the following graphs best represents an object moving at a constant speed?

• A straight horizontal line

• A straight line with a positive slope

• A curved line

• A straight line with a negative slope

What happens to an object when balanced forces act on it?

• It accelerates

• It remains at rest or moves at a constant speed

• It changes direction

• It slows down

Tags

NGSS.MS-PS2-2

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

Which of the following is a physical change?

• Rusting of iron

• Baking a cake

• Freezing water

• Burning gasoline

A cyclist travels 20 kilometers in 0.5 hours. What is the cyclist's average speed?

• 20 km/h

• 30 km/h

• 40 km/h

• 50 km/h

Which of the following best describes an object's motion on a distance-time graph when it is at rest?

• A horizontal line

• A vertical line

• A line with a positive slope

• A line with a negative slope

What is the effect of unbalanced forces on an object?

• The object remains at rest

• The object moves at a constant speed

• The object accelerates

• The object changes shape

Tags

NGSS.MS-PS2-2

Which element is a metal?

• Oxygen

• Silicon

• Iron

• Helium