Describe the difference between a chemical change & a physical change?
A chemical change creates something new, but a physical change does not
25
What state of matter has a definite shape but not a definite volume?
Liquid
10
State the Law of Conservation of Matter
Matter can never be created or destroyed
5
When 105 grams of Calcium combine with fluorine gas to produce 200 grams of calcium fluoride. How much fluoride gas is needed to react with the 105 grams of calcium?
95 grams (Law of Conservation of Matter)
20
A puddle of water evaporates. Chemical or Physical Change?
Physical. Liquid changed to Gas only
15
Salt water is a homogenous or heterogenous mixture?
Homogenous
10
A scientist examines a substance in a container. The substance does not have a shape or volume. What is sit?
Gas
10
A banana changing colors on the kitchen counter. Chemical or Physical Change?
Chemical
5
Boiling point, Combustibility, Oxidation, Reactivity. Which one is a physical property?
Boiling Point
15
Name Three Disney Movies
Random
15
To change from a liquid to a solid energy must be... added,removed, remiain constant?
Added ( heat + energy)
15
Who was drafted as the number one pick in the 2021 NFL Draft?(hint: it was last week and he went to the Jags)
Trevor Lawrence
15
Name that song and artist!
My Choice
15
A sample of water vapor condenses to form liquid water. What change in the water molecules occur?