Density
What is the formula for density?
Density = Mass/Volume
A student tests whether different amounts of sunlight affect how tall a plant grows. What is the independent variable?
Amount of sunlight
A substance has a melting point of 80°C and is shiny. Are these physical or chemical properties?
Physical
Give one example of a homogeneous mixture and one example of a heterogeneous mixture.
Answers vary
What state of matter takes the shape and volume of its container?
Gas
A block has a mass of 50 g and a volume of 10 mL. What is its density?
5 g/mL
A student tests whether different amounts of fertilizer affect plant growth. What is the dependent variable?
Plant growth/height
What type of change occurs when ice melts into liquid water?
Physical
Draw a box with a compound that is a pure substance
Drawing
List the three main states of matter based on how close together their molecules are packed
Solid, liquid, gas
Object A has a density of 0.8 g/mL, while Object B has a density of 1.2 g/mL. Which object is more likely to float in water, and why?
Object 1 because it is less dense
A scientist records that a plant is 25 cm tall and that it has 12 leaves. Is this quantitative or qualitative data?
Is flammability a physical or chemical property?
Chemical
What are the TWO types of pure substances?
Elements and compounds
What state of matter takes neither the shape or volume of its container?
Solid
A rock has a mass of 72 g and a density of 3 g/mL. What is its volume?
24mL
List TWO quantitative observations and TWO qualitative observations about our classroom. Make sure to label each.
Answers vary
A piece of iron is left outside and develops rust. Is this a physical or chemical change?
Chemical change
How would you separate two liquids in a homogenous mixture that have different boiling points?
Boiling/evaporation
As a substance is heated, what happens to its kinetic eneergy?
It increases
A substance has a density of 2 g/mL and a volume of 15 mL. What is its mass?
30g
What would be TWO controls you would want to have in the following experiment: testing different colored lights on plant growth
Same type of plant, soil, equal watering and fertilizer, same size pot, same time of light, etc.
Which type of physical property does density represent: intensive or extensive?
Intensive
Draw a mixture of the following: one diatomic element and one compound
Drawing
What state of matter is most likely to resist being compressed or squeezed into another shape?
Solid