Show:
Structures of Matter and the Periodic Table
Motion, Force, Density, and Buoyancy
Earth in the Solar System
Reactions and the Chemistry of Living Systems
Investigation and Experimentation
100
What is the chemical symbol for Iron?
Fe
100
A force can be described by its direction and its...
magnitude
100
What is the largest planet in the solar system?
Jupiter
100
Carbon atoms form covalent bonds with other atoms. In a covalent bond, electrons are...
shared
100
If the data points for a graph form a straight line, the graph shows a ______ trend
linear
200
The chemical formula MgO tells you that the number of magnesium atoms and oxygen atoms in the compound is...
1 magnesium, 1 oxygen
200
To calculate the net force of two forces acting in the same direction you would...
Add the forces to each other
200
A light year is a unit of...
distance
200
The melting point of a substance is the temperature at which the substance changes from....
solid to a liquid
200
The mass of an object is 18 grams. If the object has a volume of 3 cubic centimeters, what is its density?
6 grams per cubic centimeter
300
In a neutral atom, the number of protons and _______ must be equal
neutrons
300
A helium balloon rises in air because air is ________ dense than helium
more
300
Which planet is closest to the sun?
Mercury
300
A student finds the pH of an unknown substance. If this substance is neutral, its pH will most likely be...
7
300
What kind of graph has a constant slope?
linear graph
400
Where in the periodic table are metals found?
On the left of the zigzag line (left of the periodic table)
400
Julie rode her bike for 2 hours at an average speed of 12 km/hr. How far did she ride?
24 km/hr
400
Nuclear fusion involves... a) splitting of helium atoms b) combining of hydrogen atoms to form helium c) the radiation of hydrogen atoms through helium atoms d) eruptions of hydrogen atoms on the sun's surface
b) combining of hydrogen atoms to form helium
400
In an endothermic reaction, products have ________ energy than the reactants
more
400
The manipulated variable in an experiment is the variable that is a) not measurable b) kept constant c) purposely changed
c) purposely changed
500
Isotopes of the same element are different based on the number of...
neutrons
500
How do you calculate the slope of a line?
Divide rise by the run (rise/run)
500
What force holds galaxies together? a) gravity b) friction from gas and dust c) nuclear fusion d) dark energy
a) gravity
500
According to the Law of Conservation of Matter, in any chemical reaction, the number of atoms in the reactants is _______ the number of atoms in the products
equal to
500
A student is testing whether changing the volume of a substance will change the density. Which of the following is the responding variable? a) the density of the substance b) the volume of the substance c) the mass of the substance d) the weight of the substance
a) the density of the substance