Category 1: What is Chemistry?
The science that studies matter and its changes.
a) Biology
b) Chemistry
c) Physics
d) Geography
b) Chemistry
You must always wear this to protect your eyes.
a) Gloves
b) Safety goggles
c) Lab coat
d) Hat
b) Safety goggles
Matter that has a definite shape and volume.
a) Solid
b) Liquid
c) Gas
d) Plasma
a) Solid
1000 grams = ___ kilograms.
a) 10 kg
b) 100 kg
c) 1 kg
d) 0.1 kg
c) 1 kg
The molecule that is essential for all living things and covers about 70% of the human body.
a) Oxygen
b) Water
c) Carbon dioxide
d) Glucose
b) Water
The smallest particle of an element.
a) Molecule
b) Atom
c) Compound
d) Cell
b) Atom
True or false: You should never taste or touch chemicals.
True
Matter that takes the shape of its container.
a) Solid
b) Liquid
c) Gas
b) Liquid
1000 milliliters = ___ liters.
a) 1 L
b) 10 L
c) 100 L
d) 0.1 L
a) 1 L
The process in plants that uses sunlight to make food.
a) Respiration
b) Photosynthesis
c) Transpiration
d) Fermentation
b) Photosynthesis
A substance made of only one type of atom.
a) Mixture
b) Compound
c) Element
d) Solution
c) Element
If a chemical spills on your skin, you should wash with ___.
a) Alcohol and vinegar
b) Water
c) Alcohol
d) Vinegar
Water
Matter that has no definite shape or volume.
a) Solid
b) Liquid
c) Gas
c) Gas
1 meter = ___ centimeters.
a) 100 cm
b) 10 cm
c) 1000 cm
d) 1 cm
a) 100 cm
Sugars, fats, and proteins are types of __ important for life.
a) Atoms
b) Nutrients
c) Atoms
d) Enzymes
b) Nutrients
A substance made by combining two or more elements.
a) Mixture
b) Compound
c) Atom
d) Element
b) Compound
Long hair should be __ before using a Bunsen burner.
a) Cut
b) Tied back
c) Colored
d) Left loose
b) Tied back
The process of a liquid changing into a gas.
a) Freezing
b) Evaporation
c) Sublimation
d) Condensation
b) Evaporation
2.5 kilogram = ___ grams.
a) 1500 g
b) 250 g
c) 2500 g
d) 25 g
c) 2500 g
The gas that humans breathe in and plants release.
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Hydrogen
Oxygen
The process of changing one substance into another.
a) Physical change
b) Chemical reaction
c) Dissolving
d) Freezing
b) Chemical reaction
True or false. Wafting is a tool used to smell chemicals safely by waving air toward your nose.
True
The process of a solid changing directly into a gas.
a) Evaporation
b) Sublimation
c) Condensation
d) Melting
b) Sublimation
3 liters = ___ milliliters.
a) 300 mL
b) 3000 mL
c) 3 mL
d) 0.003 mL
b) 3000 mL
Chemical reactions that happen inside living organisms are called __ reactions.
a) Physical
b) Biochemical
c) Chemical only
d) Nuclear
b) Biochemical