A measure of the amount of matter in an object is its
Mass
100
mass is measured with a
balance
100
List three substances that result from burning wood
ash, carbon dioxide and water vapor
100
In saltwater solution, water is the
solvent
100
A combustible substance has the ability to
burn
200
A Measure of the pull of gravity on an object is its
weight
200
Newton is the metric unit for
weight
200
Daniel burns a 100-gram wood stick. After burning the stick, the mass of the ashes is 97 grams. Why is the mass of the ashes less than the mass of the wood stick?
Some matter turned into gases.
200
in a saltwater solution, salt is the
solute
200
A change in which one or more new substances are made is a
chemical change
300
A combination of two or more substances is a
mixture
300
The volume of liquids can be measured in
milliliters (mL)
300
Name some objects that have chemical energy
answers may vary: wood, batteries, gas, coal, ethanol
300
The atoms in a_________ are joined together.
compound
300
the ability of a substance to undergo a chemical change is
chemical property
400
The total amount of motion and energy due to position is
mechanical energy
400
the length of the rectangle block is 10 cm long, the width is 3 cm and the height is 3. What is the volume of the block?
90 cm3. volume of a rectangle is length x width x height
400
Anna cooks eggs, Describe signs to know it is complete
answers may vary
400
how does stirring and temperature affect speed in a solution
stirring helps the solute dissolve faster
Temperature helps the solute dissolve faster.
400
list chemical properties
answers may vary ability to burn, ability to rust,
500
The total amount of energy stays the same during
energy conversion
500
Christina drops a coin into a graduated cylinder contains 20 mL of water. The reading on the graduated cylinder becomes 30. What is the volume of the coin?
10 mL
500
A Laptop turns electricity into different forms of energy. Describe three examples of energy i.e. speakers, screen, fan
sound energy through the speakers, light energy with the monitor, and mechanical energy in the fan.
500
Please give an example of a solution and an example of a mixture that is not a solution.
answers may vary lemonade, tea, chocolate milk a mixture: a salad.
500
Elastic potential energy of a rubber band
2 rubber bands are stretched out, 1 is stretched to be 20 cm the other is stretched to 25 cm, which one has more potential energy?
The rubber band stretched to 25 cm has more elastic potential energy