What type of change do you have when you dissolve salt in water?
physical change
(mixtures are physical changes)
100
The basic energy transformation of the sun helping a plant grow is
light (electromagnetic) to chemical.
100
Table sugar and salt are examples of
compounds
100
The density of a block of wood with a volume of 50 cubic centimeters and a mass of 100 grams is
2 g/cm3
100
These hold atoms together in molecules
chemical bonds
200
The bending of light waves as they pass through different materials is known as
refraction.
200
Substances that cannot be broken down chemically into other substances are
elements
200
If you want to measure the volume of an irregularly shaped object, you will use
water displacement
200
Anything that has mass and takes up space is called
matter
300
If a bulb goes out in a series circuit, what will happen to the other bulbs in the circuit?
they will go out
300
All elements are composed of extremely small particles called
atoms
300
The density of aluminum is 2.7 g/cm3. A piece of aluminum foil has a volume 54 cm3. What is the mass of this piece of aluminum foil?
145.8 g
300
Soil and salad are examples of
mixtures
400
Using electricity to break down water into hydrogen and oxygen is a ____________ change.
chemical
400
If a 100 N force acts on a 50 kg box and friction has a force of 20 N, what is the net force on the box?
80 N
400
Aluminum and oxygen are examples of
elements.
400
Paperclip has a density of 1.2 g/cm3. Will it sink or float in water?
sink
400
During a science lab experiment Ms. Gibson combined a 25 g tablet with 50 g of water in a Ziploc bag. What was the total mass of the bag once the reaction was completed?
75 g
500
If you describe methane as a gas that easily catches fire, you are describing a _____________ property.
chemical
500
Calculate the voltage of a circuit with a resistance of 3 ohms and a current of 120 amps.
V = IR = 3 ohms x 120 amps = 360 V
500
Explain the difference between atoms and molecules
Atoms are the basic parts of matter, molecules are atoms that are chemically combined.
500
A 54 gram sample has a volume of 20 cm3. What is the sample's density?
2.7 g/cm3
500
A change in which energy is taken in is known as a(n)