Florida Science Grade 8

Chapter 6: Atomic Structure and Chemical Bonds

Atomic Structure and Chemical Bonds

Your Results:

The correct answer for each question is indicated by a .

1			What causes a buoyant force? Need a Hint?
			A)	the hydraulic pressure of the system
			B)	the force of the air on the liquid's surface
			C)	the force of the liquid pushing up an object
			D)	the volume of fluid
2			Gases can be __________. Need a Hint?
			A)	expanded and compressed
			B)	boiled
			C)	expanded but not compressed
			D)	destroyed
3			Particles with more energy move __________ than particles with less energy. Need a Hint?
			A)	slower and closer together
			B)	faster and farther apart
			C)	faster and closer together.
			D)	slower and farther apart
4			A warmer substance has more __________ than a cooler one. Need a Hint?
			A)	thermal energy
			B)	temperature
			C)	matter
			D)	specific heat
5			Which is not a physical state of matter? Need a Hint?
			A)	gas
			B)	liquid
			C)	solid
			D)	vacuum
6			Because lead has a lower density than liquid mercury, it will __________ in mercury. Need a Hint?
			A)	dissolve
			B)	melt
			C)	sink
			D)	float
7			Vaporization is different from evaporation because __________. Need a Hint?
			A)	only vaporization involves a change of state
			B)	evaporation occurs in the liquid
			C)	evaporation occurs at the surface
			D)	vaporization occurs at the surface
8			Which best describes particles in a liquid? Need a Hint?
			A)	completely unmoving
			B)	more freely moving than a solid
			C)	less freely moving than a solid
			D)	more freely moving than a gas
9			Matter takes up __________. Need a Hint?
			A)	space and mass
			B)	space and temperature
			C)	heat and temperature
			D)	space and heat
10			Syrup has __________ viscosity. Need a Hint?
			A)	low
			B)	no
			C)	high
			D)	runny
11			A substance with a high __________ takes more heat to raise its temperature one degree Celsius. Need a Hint?
			A)	specific heat
			B)	temperature
			C)	matter
			D)	thermal energy
12			What moves in or out of a substance during a change of state? Need a Hint?
			A)	mass
			B)	matter
			C)	heat
			D)	temperature
13			__________ is the average kinetic energy of the individual particles of a substance. Need a Hint?
			A)	Matter
			B)	Heat
			C)	Energy
			D)	Temperature
14			If a container of gas gets larger while the temperature remains the same, the pressure __________. Need a Hint?
			A)	remains the same
			B)	fluctuates
			C)	increases
			D)	decreases
15			What type of solids do not have a specific melting point? Need a Hint?
			A)	amorphous
			B)	viscous
			C)	runny
			D)	crystalline
16			The melting point of a substance is __________ its freezing point. Need a Hint?
			A)	less than
			B)	the same as
			C)	independent of
			D)	greater than
17			The force exerted on an area is known as __________. Need a Hint?
			A)	temperature
			B)	volume
			C)	specific heat
			D)	pressure
18			What causes surface tension? Need a Hint?
			A)	particles of gas pushing down on a liquid
			B)	particles of a liquid pushing on the sides of a container
			C)	particles of a liquid pulling along the surface
			D)	particles of a liquid pushing up on the surface
19			__________ is the ability to do work or cause change. Need a Hint?
			A)	State
			B)	Matter
			C)	Energy
			D)	Mass
20			Solids have __________ shape and volume. Need a Hint?
			A)	definite
			B)	no
			C)	indeterminate
			D)	changing

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