Matter
What phase change occurs when a solid becomes a liquid?
melting
What are positive particles in an atom called?
protons
Where are the reactants located in a chemical equation?
left side
What type of mixture is milk?
homogeneous
What is a force?
a push or pull causing an object to move
What phase change occurs when a gas becomes a liquid?
condensation
What are negative particles in an atom called?
electrons
Where are the products located in a chemical equation?
right side
What type of mixture is Chex Mix?
heterogeneous
What is the amount of force acting on a box with a mass of 10 kg and an acceleration of 5 m/s/s?
50 N
What phase change occurs when a liquid becomes a gas?
evaporation
The number of protons and neutrons in an atom's nucleus is called?
atomic mass
Is this equation balanced?
H2 + O = H2O
yes
How can a mixture of sand and salt be separated?
place in water, filter sand, evaporate water
Is gravitational pull a contact or noncontact force?
noncontact force
When heat energy is added to a substance, what happens to the speed and position of the particles?
move faster and get further apart
How are elements on the Periodic Table are arranged?
by atomic number
What is the symbol for the element carbon?
C
Is sugar a mixture or a compound?
compound
In a tug-of-war one group pulls with 10N of force and the other group pulls in the opposite direction with 10N, what is the resultant force and direction of movement?
10N - 10N = 0, no movement
When heat energy is removed from a substance, what happens to the speed and position of the particles?
slow down and move closer together
How many different atoms are present in the formula C6H12O6?
three
Why are elements placed in certain groups or families?
they share similar physical and chemical characteristics
How can mixture of iron filings, sand, and salt be separated?
iron with a magnet, put in water, filter sand, evaporate water
One person is pulling a piano to the right with 15N of force, and the other is pushing the piano to the right with 20N of force. What is the resultant force and direction of movement of the piano?
35N to the right