Chemistry Basics
Math Skills
Properties of Matter
Changes in Matter
Matter lab
100

What is the difference between mass and weight?

Mass = amount of matter

weight = mass + effect of gravity

100

What are the units used for mass, volume, and distance/length?

mass = grams

Volume = ml or liter (example)

Distance = meters


100

What are the 3 common states of matter?

Solid, liquid, gas

100

Cutting wood is what type of change? physical or chemical?

No stealing on this question

Physical change

100

Does changing the volume of water change its density?

No density stays the same

200

Give one example of qualitative data and one of quantitive data.

Example

Qualitative = color of a liquid. 

Quantitative = temperature of 25°C

200

Express 350,000 in scientific notation.

3.5 x 105

200

Define extensive property and give an example.

Depends on the amount of matter

Example = mass, volume etc

200

Cooking an egg is what type of change? physical or chemical?

No stealing on this question

Chemical change

200

Chromatography showed that ink separated into colors. Does this mean ink is a compound or a mixture?

a mixture

300

what is the independent variable in an experiment?

The variable the scientist changes.

300

Solve (5 × 10⁻⁵) + (2 × 10⁻⁵) 

On a piece of paper write your answer. you have 2 min.

7 × 10⁻⁵

300

Define intensive property and give an example.

Does not depend on the amount of matter.

Example = density, boiling point etc.

300

What law states that matter is neither created nor destroyed in a chemical reaction?

Law of conservation of mass

300

Why did pre-1982 pennies have a different density than post-1982 pennies?

Pre-1982 pennies were mostly copper; post-1982 are mostly zinc (metal) with copper coating.

400

Which variable is responding to an intentional change; the variable the scientist is measuring? 

Independent variable or dependent variable?

No stealing on this question

Dependent Variable

400

If 1 gallon = 4 quarts and 1 L = 0.908 quarts, how many liters are in 2 gallons?

On a piece of paper write your answer. you have 4 min.

8.8 L

400

What is the difference between vapor and gas?

Gas = naturally gaseous at room temp

Vapor = gaseous form of something normally liquid/solid at room temp. 

400

Provide a sign of a chemical change occurring.

Fizzing, temperature change, release of light, color change, odor change

400

In the cornstarch lab, the mixture sometimes acted like a solid and sometimes like a liquid. Is this mixture homogeneous or heterogeneous?

Heterogeneous — the mixture does not have a uniform composition throughout.

500

A scientist tests fertilizer on plant growth. Identify the independent variable, dependent variable, and control group.

Independent = fertilizer

Dependent = plant growth

Control = plants with no fertilizer.

500

A runner drinks 2 bottles of water during practice. Each bottle holds 500 mL. 1 l = 1000 ml

How many liters of water did the runner drink?

On a piece of paper write your answer. you have 4 min.

1 L

500

What is the difference between homogenous and heterogenous mixtures?

Homogeneous = uniform composition (salt water, air). Heterogeneous = not uniform (sand and water, salad).

500
Explain why melting ice is a physical change and not a chemical one.

The composition of H2O does not change, only the state changes.

500

In your own words, explain the difference between a closed system and an open system in the Conservation of Mass lab.

Closed = nothing enters or leaves, so mass stays the same. Open = gas can escape, so measured mass may decrease.