2.4

When we mix magnesium metal with oxygen, we see a bright white flame and a white powder. Which is the product?

• the flame

• the powder

• oxygen

• magnesium metal

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Eggs rotting is an example of a chemcial reaction because...

• a gas that smells bad is formed

• the egg shrinks

• the egg yolk and egg white separate from each other

Tags

NGSS.MS-PS1-2

Which of the following is NOT evidence that a chemical reaction has occured?

• formation of liquid droplets above a solution

• colour of the solution changing from clear to yellow

• formation of smoke when a candle burns

Tags

NGSS.MS-PS1-2

What are the factor(s) that affect gravitational energy?

• Weight

• Rigidity

• Elevation

• Speed

Tags

NGSS.MS-PS3-2

What are the factors that affect Kinetic Energy?

• Mass

• Elevation

• Elasticity

• Speed

Tags

NGSS.MS-PS3-1

What are the factors that affect Elastic Energy? (choose all that apply)

• Deformation

• Rigidity

• Mass

• Speed

Which of the following is an example of an energy conversion? Choose ALL that apply.

• Bouncing a ball

• Throwing a piece of paper

• A pencil sitting on a desk

• Hitting pins with a bowling ball

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

In what order does energy convert when a ball bounces?

• GE to KE to EE to KE to GE

• KE to EE to KE

• GE to EE to KE to EE to GE

• EE to KE to GE

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What is the atomic number of helium?

• 1

• 2

• 3

• 4

Which of the following is a noble gas?

• Oxygen

• Nitrogen

• Helium

• Hydrogen