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Worksheets2015 7th Grade RNJH Science Semester Review
Total questions: 42
Worksheet time: 21mins
Name
Class
Date
1.
For a hypothesis to be valid, it must be...
a)
Correct
b)
Testable
c)
Made into a Law
2.
When working in the lab you must wear goggles...
a)
never
b)
all the time, no exceptions
c)
only when working with chemicals
3.
An element...
a)
is made of 2+ elements
b)
is a pure substance
c)
is chemically combined with other atoms
d)
can be broken down
4.
Which of the following is an example of a compound?
a)
C6H12O6
b)
Li2
c)
O
d)
C1,000,000
5.
A constant is a variable that
a)
changes
b)
is on the Y axis
c)
stays the same
d)
is manipulated
6.
You can tell if a chemical change has occurred when
a)
the reaction ends in a NEW substance
b)
a precipitate forms
c)
when it changes form
d)
when the elements sublimate
7.
In a physical change, the substance
a)
changes appearance or forms
b)
rusts
c)
reacts with acid
d)
forms a new substance
8.
Calculate the density of an object with a mass of 50g and a volume of 5mL
a)
.1g/mL
b)
250g/mL
c)
.1g/mL250g/mL100g/mL
d)
10g/mL
9.
Which of the following is NOT a property of metal?
a)
Lustrous
b)
Malleable
c)
Conductive
d)
Brittle
10.
Where will you find metalloids on the periodic table?
a)
the far left side
b)
the far right side
c)
along the stairstep
d)
metalloids aren't a real thing
11.
Nonmetals are usually ______ at room temperature.
a)
Solid
b)
Liquid
c)
Gas
d)
Plasma
12.
What is the force that keeps the earth revolving around the sun?
a)
Mass
b)
Distance
c)
Gravity
d)
Weight
13.
What two factors determine an objects gravitational influence?
a)
Weight/Distance
b)
Mass/Distance
c)
Mass/Volume
d)
Distance/Volume
14.
A meteor becomes a meteorite when it...
a)
impacts earth
b)
enters earth's atmosphere
c)
orbits around the sun
d)
orbits earth
15.
Energy is defined as the ability to...
a)
move
b)
jump
c)
do work
16.
Potential energy is
a)
energy of motion
b)
energy from breaking chemical bonds
c)
stored energy
d)
energy from light
17.
Which of these is NOT essential for habitability?
a)
Temperature
b)
Liquid Water
c)
Atmosphere
d)
Bacteria
18.
Kinetic Energy is
a)
stored energy
b)
light energy
c)
energy of motion
d)
energy from food
19.
What is the energy conversion in Photosynthesis?
a)
radiant --> Thermal
b)
Radiant --> Mechanical
c)
Radiant --> Chemical
d)
Radiant --> Electrical
20.
The law of conservation of energy states that energy cannot be ___ or ___.
a)
broken down, restored
b)
created, destroyed
c)
created, transformed
21.
Biotic factors are things that are
a)
non-living
b)
living
c)
zombies
22.
Abiotic factors are things that are
a)
non-living
b)
living
c)
zombies
23.
A community is...
a)
all the biotic and abiotic factors in an area
b)
all the abiotic factors in an area
c)
all the species living together in an area
d)
all the members of a single species in an area
24.
A population is...
a)
all the biotic and abiotic factors in an area
b)
all the abiotic factors in an area
c)
all the species living together in an area
d)
all the members of a single species in an area
25.
An ecosystem is...
a)
all the biotic and abiotic factors in an area
b)
all the abiotic factors in an area
c)
all the species living together in an area
d)
all the members of a single species in an area
26.
All of the following are producers EXCEPT...
a)
Grass
b)
Algae
c)
Cyanobacteria
d)
Worms
27.
In an energy pyramid, the most available energy is at the _______ level.
a)
Primary Consumer
b)
Tertiary Consumer
c)
Producer
d)
Decomposer
28.
The ultimate energy source on earth is the ______
a)
Sun
b)
Plants
c)
Producers
d)
Decomposers
29.
What percentage of energy is transferred at each level in an energy pyramid?
a)
100%
b)
90%
c)
10%
d)
50%
30.
When there is an abundance of resources, populations ______.
a)
Decrease
b)
Stay the same
c)
Increase
d)
go extinct
31.
Identify a producer in the food web.
a)
Foxes
b)
Birds
c)
Grasshopper
d)
Grains
32.
Identify an herbivore in the food web.
a)
Foxes
b)
Birds
c)
Rabbits
d)
Grains
33.
Identify a tertiary consumer in the food web.
a)
Foxes
b)
Birds
c)
Grasshopper
d)
Grains
34.
In a food web, what do arrows indicate?
a)
Flow of Energy
b)
Flow of Oxygen
c)
Organic Compounds
35.
What is the KEY element that organic compounds contain?
a)
Hydrogen
b)
Oxygen
c)
Nitrogen
d)
Carbon
36.
A relationship where one organism benefits and the other is hurt.
a)
Symbiosis
b)
Mutualism
c)
Commensalism
d)
Parasitism
37.
A relationship where one organism benefits and the is unharmed.
a)
Symbiosis
b)
Mutualism
c)
Commensalism
d)
Parasitism
38.
A relationship where both organisms benefit.
a)
Symbiosis
b)
Mutualism
c)
Commensalism
d)
Parasitism
39.
A relationship 2 or more organisms living closely together with some sort of feeding relationship.
a)
Symbiosis
b)
Mutualism
c)
Commensalism
d)
Parasitism
40.
A biome is..
a)
A group of ecosystems with similar climates and organisms
b)
an area with little rain and hot temperatures
c)
when two climates mix together
41.
The two factors that mainly dictate a biome are Temperature and _____.
a)
Organisms
b)
Precipitation
c)
Plants
d)
Sunlight
42.
A dichotomous key is used for _________ organisms/items that is made up of a series of paired descriptions to choose between.
a)
Classifying
b)
Identifying
c)
Grouping
d)
Pairing
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