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WorksheetsFIRST QUARTER SCIENCE 7 REVIEWER
Total questions: 60
Worksheet time: 3hrs 31mins
You water three tomato plants with sugar water. Each plant receives a different concentration of sugar solutions. A fourth plant receives pure water. After a two-week period, the height is measured. What is the manipulated or independent variable?
different concentration of sugar solutions
height of tomato plants
plant type
time
In an experiment, which of the following is measured for its observable changes?
independent variable
controlled variable
constant variable
dependent variable
Which of the following DOES NOT belong to the group?
SIlver (Ag)
Muriatic acid (HCl)
Table salt (NaCl)
Carbon dioxide ( CO2 )
What does this diagram represent?
compounds
mixture of elements
mixture of compounds
mixture of compounds and element
A student is observing a substance that contains multiple element that have been chemically combine C6H12O6(SUGAR). Which of the following best describes what the student is observing?
Heterogeneous Mixture
Homogeneous Mixture
Element
Compound
atom
This part of the experiment serves as a basis of comparison:
control group
Independent variable
dependent variable
data
This variable in an experiment is the one being deliberately changed by the scientist.
dependent variable
independent variable
data
control group
An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the independent variable is ...
type of plant
the amount of sunlight
the type of music
the type of liquid
An experiment was carried out to determine whether drinking caffeinated soda increases pulse rate. The pulse rates of two groups of people at rest were measured. Group A was then given caffeinated soda and group B was given caffeine-free soda. One hour after drinking the soda, the pulse rates were measured. The participants in the experiment were all the same age, and they were all given the same amount of soda. The dependent variable in this experiment is the
type of soda given to each group
amount of soda given to each group
pulse rate of each group
age of participants in each group
atom
atom
When one or more substance is combined CHEMICALLY it is called __________________.
compound
element
mixture
solution
Provided is a list of five different substances.
NaOH Cu H2O N2 H2
How many of these substances are elements?
2
3
4
5
Which of the following represents an element?
H2O
HCl
NaCl
Au
CaCO3
When you increase the energy by heating a liquid what happens to the motion of the molecules
They slow down
They speed up
Heat doesnt change the motion of the molecules
made up of?
If plants are exposed to sunlight, then they will grow taller.
What part of the scientific method is this an example of?
Procedure
Hypothesis
Question
Results
Read each statement. Then choose whether the statement is an observation, inference, or prediction.
In 6 months, it will be too hot to go outside.
observation
inference
prediction
Read each statement. Then choose whether the statement is an observation, inference, or prediction.
The container is filled to the 350 mL mark.
observation
inference
predition
648 g = ____ mg
6,480
64,800
648,000
64.8
240 cm = ___________ m
2400
24
2.4
0.24
1000 grams = _____ kilograms
0.0001
1,000,000
10
1
What type of scientific model is a smaller or larger representation of things being studied?
Physical model
Mathematical model
Conceptual model
Experimental model
What type of scientific model uses equations to represent a phenomenon?
Physical model
Mathematical model
Conceptual model
Experimental model
What is the equation e = mc^2 an example of?
Physical model
Mathematical model
Conceptual model
Experimental model
What type of scientific model ties together many ideas to explain a phenomenon?
Physical model
Mathematical model
Conceptual model
Experimental model
What is one advantage of physical scientific models?
They provide accurate details of scientific phenomena
They are easy to understand
They can represent things too big or too small to see
They are always larger than the actual object
What is a test/independent variable?
The variable that is changed/manipulated in the experiment
The variable that is being observed/measured in the experiment
Elements that are kept constant/unchanged in the experiment
The group that does not receive the manipulation; used to compare
The groups that do receive the manipulation
What is a control group?
The variable that is changed/manipulated in the experiment
The variable that is being observed/measured in the experiment
Elements that are kept constant/unchanged in the experiment
The group that does not receive the manipulation; used to compare
The groups that do receive the manipulation
What is an experimental group?
The variable that is changed/manipulated in the experiment
The variable that is being observed/measured in the experiment
Elements that are kept constant/unchanged in the experiment
The group that does not receive the manipulation; used to compare
The groups that do receive the manipulation
What is a control variable/constant?
The variable that is changed/manipulated in the experiment
The variable that is being observed/measured in the experiment
Elements that are kept constant/unchanged in the experiment
The group that does not receive the manipulation; used to compare
The groups that do receive the manipulation
Which word is associated with the outcome/dependent variable?
Change
Measure
Which word is associated with the test/independent variable?
Change
Measure
What is the test/independent variable in this experiment?
The height of the plants
The color of the lightbulbs
What is the outcome/dependent variable in this experiment?
The height of the plants
The color of the light bulbs
What is the control group in this experiment?
The group with the red light
The group with the white light
The group with the blue light
The group with the green light
Which of the following is a control variable/constant in this experiment?
The color of the light
The type of plant
True or False: An experiment may have more than one control.
True
False
True or False: a test may have more than one independent variable
true
false
HYPOTHESIS: Does study time affect the student's score on an test?
Use the table to answer questions 11 and 12.
Suppose you collected this data from students in your school. What is the independent variable in the study?
The Students
The Study Time
The Grade on the Quiz
An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid, water, apple juice and gatorade. Each plant has the same amount of sunlight, soil and listens to the same music. What is the control?
The size of the plant.
The type of liquid.
There are no controls.
Amount of sunlight, soil and music.
An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid, water, apple juice and gatorade. Each plant has the same amount of sunlight, soil and listens to the same music. What is the independent variable?
the type of plant
the type of liquid
the type of music
the amount of liquid
In this same experiment of Steve finding out which type of fertilizer would make his sunflowers grow larger, what would be the dependent variable?
Type of fertilizer
Size of sunflower
Type of sunflower
Steve wanted to see if the type of fertilizer he uses in his garden makes his sunflowers grow larger. If he did an experiment to find this out, what would be the independent variable?
Type of fertilizer
Size of sunflower
type of sun flower
