Density
How does something float?
it is less dense than the substance it is in
What is the only proof of a chemical change?
formation of a new substance
What are the 3 states of matter?
solid, liquid, gas
What is a reactant?
what goes in, the left side of the arrow
Sarah
What is the equation for density?
Density= Mass/Volume
What are 4 signs of a chemical change?
1. change in energy
2. change in color
3. change in odor
4. formation of bubbles
bonus: forming a precipitate
What is the main difference between a chemical and a physical change?
chemical change: new substance is formed, physical change: nothing new is formed
What is a product?
what comes out, right side of the arrow
What pets do I have?
two cats
What are the two ways to measure volume?
LxWxH and Water displacement
Which of the following is a chemical change?
A. cracking an egg
B. mixing incredients
C. baking the cake
D. cutting the cake
C. baking the cake
Which of the following is a physical change?
A. metal corroding
B. dying your hair
C. iron rusting
D. dissolving salt in water
D. dissolving salt in water
What are the two types of chemical reactions?
endothermic and exothermic
Where did I go to college?
University of Rhode Island
What is the density of an object with a mass of 4g and a volume of 8mL?
0.5g/mL
Why is boiling water not a chemical change?
How does a liquid turn to a solid?
freezing
What type of reaction absorbs thermal energy?
endothermic
What type of science do I have a degree in?
biology
What is the volume of an object with a density of 2g/mL and a mass of 8g?
4mL
they rearrange
How does a gas turn to a liquid?
condensation
If there are 6 carbon atoms in the reactants, how many carbon atoms are in the products? How do you know?
6 carbon atoms, law of conservation of mass
Lobster