Dependent
Variable
Variable
Atoms
Scientific Method
Independent Variable
Random
100
What is a Dependent Variable?
What is measured
100
Name the three subatomic particles and their charges
Proton (+)
Neutron (0)
Electron (-)
100
What is a hypothesis?
An educated guess using “if, then”
100
What is an independent variable?
Variable that is changed
100
How many atoms are in H2O?
3 atoms
2 H
1 O
200
A cow is given a growth hormone and then compared to another cow that was not given a growth hormone. Both cows were weighed at 2 years.
Weight of the cow
200
Explain the difference between a compound and a molecule.
A molecule is two or more atoms
A compound is two or more elements
200
Data measured by qualities
Qualitative
200
Two different cars are traveling at 60 mph. At a certain point, both cars slam on the brakes. The distance it takes for each car to stop is then measured.
Type of car
200
Which is the product in this equations?
CaCO3 → CO2 + CaO
CO2 + CaO
300
Mosquito repellent is sprayed on one arm and the other arm is not sprayed. The number of mosquito bites is counted after 2 hours.
Number of bites
300
Which part of an atoms is responsible for creating bonds?
Electrons
300
Data measured in numbers
Quantitative
300
A stapler is used to staple 100 papers, it jams 5 times during the trial. A different brand of stapler performs the same test; it jams 22 times.
Type of stapler
300
What are the four most common elements
Nitrogen
Oxygen
Carbon
Hydrogen
400
One grape is placed in tap water and another grape is placed in salt water. The change in their mass is measured after a day.
The grape’s mass
400
How do you find the number of protons and electrons in an atom?
The atomic number
400
What is a constant/control variable?
Stays the same
400
Two plants are grown using the same light and pots. One plant is given water that has been microwaved and the other plant is given regular tap water. Their height is measured after 2 weeks.
Water
400
What element is most common in human?
Oxygen
500
Pillbugs are placed in a container where they have a choice of a wet or a dry environment. Researchers record how much time was spent on each side.
Bug’s time on each side
500
Which two are the same element?
D and E
Same number of protons!
500
Define Quantitative and Qualitative
Quantitative -- Numbers
Qualitative -- Qualities
500
An apple is cut into slices. Half of the slices are sprayed with lemon juice. All slices are stored in a sealed plastic bag. After 4 days, they are observed to see how brown they turned.
Presence of lemon juice
500
How do you use a ruler?
Count the notches and make sure you have the right units