TEK 6.6(A) – Solids, Liquids, Gases
C) Gas – no definite shape, no definite volume
B) Saltwater
Which element is a metal?
A) Oxygen
B) Copper
C) Sulfur
D) Boron
B) Copper
Which object will float in water? (Density of water = 1 g/mL)
A) Wood, density = 0.6 g/mL
B) Iron, density = 7.8 g/mL
C) Aluminum, density = 2.7 g/mL
D) Glass, density = 2.5 g/mL
A) Wood, density = 0.6 g/mL
Which of the following is evidence of a chemical change?
A) Ice melting
B) Sugar dissolving in water
C) A piece of metal rusting
D) Water boiling
C) A piece of metal rusting
B) Molecules in gases move faster than molecules in solids.
B) Melting point
Which property is common to metalloids?
A) Good conductors of heat
B) Dull in appearance and brittle
C) Sometimes conduct electricity
D) React violently with wate
C) Sometimes conduct electricity
A cube of metal has a mass of 54 g and a volume of 9 cm³. Calculate its density. Will it sink or float in water?
A) 6 g/cm³, sink
B) 6 g/cm³, float
C) 15 g/cm³, sink
D) 15 g/cm³, floa
A) 6 g/cm³, sink
When vinegar reacts with baking soda, which evidence shows a chemical change?
A) Dissolving of baking soda
B) Formation of gas bubbles
C) Change in volume only
D) Ice forms
B) Formation of gas bubbles
C) Liquid particles can move past each other, while solid particles are tightly packed.
B) Filtering the mixture
Why are some metals important in modern life?
A) They are always liquids.
B) They can be used for strength, conductivity, or resistance to corrosion.
C) They never react with any other substance.
D) They float on water
B) They can be used for strength, conductivity, or resistance to corrosion.
Why does oil float on water even though both are liquids?
A) Oil has a higher density than water
B) Oil has a lower density than water
C) Water evaporates faster than oil
D) Oil freezes faster than water
B) Oil has a lower density than water
A solution changes color after two chemicals are mixed. What type of change occurred?
A) Physical change; color change is temporary
B) Chemical change; new substance formed
C) Physical change; no new substance formed
D) Physical change; only temperature changes
B) Chemical change; new substance formed
Which state of matter has a definite volume but takes the shape of its container?
A) Solid
B) Liquid
C) Gas
D) Plasma
B) Liquid
Which of the following is a heterogeneous mixture?
A) Saltwater
B) Sugar dissolved in water
C) Trail mix
D) Vinegar
C) Trail mix
Which element is a nonmetal?
A) Sodium
B) Helium
C) Iron
D) Silicon
B) Helium
A liquid has a density of 0.8 g/mL. What will happen if you pour it into water? (Density of water = 1 g/mL)
A) It will sink
B) It will float
C) It will mix evenly
D) It will evaporate immediately
B) It will float
Which of the following is NOT evidence of a chemical change?
A) Production of gas
B) Formation of precipitate
C) Melting of ice
D) Color change
C) Melting of ice
A balloon is filled with gas. When you heat the balloon, what happens to the gas particles?
A) They move slower and closer together
B) They move faster and spread apart
C) They stop moving completely
D) They become a solid
B) They move faster and spread apart
Which of the following is a pure substance?
A) Air
B) Gold
C) Salad
D) Saltwater
B) Gold
Which property could you use to separate iron filings from sand?
A) Magnetism
B) Color
C) Melting point
D) Solubility in wate
A) Magnetism
Which of the following could you use to compare densities of two solids?
A) Volume and mass
B) Color and taste
C) Temperature and shape
D) Hardness and smel
A) Volume and mass
Which of these is a chemical change?
A) Boiling water
B) Burning wood
C) Crushing a can
D) Dissolving sugar
What is Burning wood?