Chemistry year 7

Number 2 represents a ________

• solid
• liquid
• gas
• plasma

Particles in a _____________ are tightly packed together.

• solid

• liquid

• gas

As particles are exposed to warmer temperatures they __________

• speed up
• slow down
• stay the same
• vibrate

As particles are exposed to colder temperatures they _____

• speed up
• slow down
• stay the same
• become ions

What am I? I have a fixed mass, a fixed volume, I cannot be squashed and I have a shape that changes to fit the bottom of my container?

• solid

• liquid

• gas

An inflated balloon is placed in a refrigerator. Which statement describes the movement of the gas particles in the balloon?

• The particles move more slowly and become closer together.
• The particles move more slowly and become further apart.
• The particles move faster and become closer together.
• The particles move faster and become further apart. 

Tags

NGSS.MS-PS1-4

Which point of the particle theory is depicted by this picture?

• all matter is made of particles
• particles are in constant, random motion
• particles speed up as heat is added and slow down as heat is removed
• different substances are made of different types of particles

Tags

NGSS.MS-PS1-4

The amount of matter in an object is a measure of the object's ________________.

• volume
• density
• mass
• solubility

Which description best matches this particle model?

• Closely packed and can't move a lot. 
• Particles are close together but can move a little. 
• Particles have lots of energy and can move around. 

Which description best matches this particle model?

• Closely packed and can't move a lot. 
• Particles are close together but can move a little. 
• Particles have lots of energy and can move around.