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2024 7th Science Semester Exam

Total questions: 80

Worksheet time: 3hrs 53mins

Name
Class
Date
1.

The cell theory applies to all organisms, including the five shown. Which of the following statements describes how these organisms are an example of the cell theory?

a)

The organisms have cells that lack a nucleus.

b)

The organisms are made of one or more cells.

c)

The cells of the organisms undergo photosynthesis.

d)

The cells of the organisms are identical to each other.

2.
A cell is...
a)
the basic unit of structure and function in living organism
b)
an organism
c)
a basic part of everything that we see
d)
found only in animals, not plants
3.
Which of the following are NOT found in animal cells
a)
chloroplasts and cytoplasm
b)
chloroplasts and cell wall
c)
cell wall and cell membrane
d)
mitochondria and nucleus
4.

Which of the following converts food into energy for the cell?

a)

vacuole

b)

mitochondria

c)

cytoplasm

d)

cell membrane

5.
Which of the following, found ONLY in plant cells, provides structure?
a)
cell wall
b)
chloroplast
c)
mitochondria
d)
vacuole
6.
The nucleus is like the ____________ of the cell.
a)
foot
b)
hand
c)
stomach
d)
brain
7.

Which of the following is the correct order of organization in living things from most basic (simple) to most complex?

a)

organism, cell, tissue, organ, organ system

b)

organ system, organ, tissue, cell, organism

c)

cell, tissue, organ, organ system, organism

d)

cell, organ, tissue, organism, organ system

8.

Carries oxygen and nutrients to all parts of the body.

a)

Integumentary

b)

Nervous

c)

Circulatory

d)

Respiratory

9.

Supports and provides structure for the body

a)

Skeletal

b)

Muscular

c)

Circulatory

d)

Respiratory

10.

Supplies blood with oxygen and rids the body of carbon dioxide

a)

Integumentary

b)

Nervous

c)

Circulatory

d)

Respiratory

11.

Allows movement in the body

a)

Integumentary

b)

Nervous

c)

Skeletal

d)

Muscular

12.

Where does photosynthesis occur?

a)

In the mitochondria

b)

In the chloroplast of animal cells

c)

In the chloroplast of plant cells

d)

In the mitochondria of plant cells

13.

What type of energy conversion occurs in photosynthesis?

a)

Light from the sun to chemical in glucose

b)

Chemical in glucose to chemical in ATP

14.

Which of the following are products of photosynthesis?

a)

glucose and oxygen

b)

glucose and water

c)

carbon dioxide and water

d)

ATP and sunlight

15.

Get their energy from consuming plants (primary consumers)

a)

producers

b)

herbivores

c)

omnivores

d)

carnivores

16.

Grasses directly pass energy to...

a)

grasshopper, frog, bird

b)

mouse, rabbit, grasshopper

c)

rabbit, fox, snake

d)

frog, owl, mouse

17.

What is the frog considered in this food web?

a)

producer

b)

primary consumer

c)

secondary consumer

d)

tertiary consumer

18.

Which organism DOES NOT pass energy directly to the eagle?

a)

rat

b)

thrush

c)

frog

d)

dragonfly

19.

How much energy is available to be passed on to the next trophic level in an ecosystem?

a)

700%

b)

20%

c)

5%

d)

10%

20.

The arrows in a food chain or web represents what?

a)

They point to the organism that is being eaten.

b)

They show what direction the energy is flowing between organisms.

c)

It shows how sunlight flows within an ecosystem.

d)

They represent how water is transferred within a habitat.

21.
Iron rusts.
a)
Chemical change
b)
Physical Change
22.
Food is digested in the stomach
a)
Chemical Change
b)
Physical Change
23.

Which of the following are examples of a Chemical Change?

a)

Iron Rusting

b)

Gas Burning

c)

Breaking a glass

d)

Boiling water

e)

Burning Wood

24.

What is a chemical change?

a)

Forming a new substance

b)

When two or more substances combine to make a greater one

c)

When two or more substances combine to make a new chemical substance

d)

Combing substances

25.

Color change like in a drop of food coloring in water, is a _________ change.

a)

physical

b)

chemical

26.

Which catastrophic event would most likely result in trees being knocked over and the disappearance of most of the plants and animals along a narrow path in a forest ecosystem?

a)

tornado

b)

volcanic eruption

c)

flash flood

d)

earthquake

27.

A diagram of the areas surrounding the Gulf of Mexico is provided. A hurricane that comes in from the Gulf of Mexico will most likely have which of the following negative effects on a Texas habitat?

a)

Plants on Goose Island are killed by a surge of salt water.

b)

Trees in and around Austin are uprooted by heavy winds.

c)

Birds that eat fish on Galveston Island become extinct.

d)

Rains create new marshland habitats in Brazos Bend.

28.

The extremely strong winds associated with a tornado will have the greatest negative effect on which of the following kinds of organisms?

a)

Fish that feed around coral reefs

b)

Smaller mammals that burrow underground

c)

Birds and other animals that use trees for shelter

d)

Organisms that feed on decaying plants and animals

29.

Which type of succession occurs on freshly formed on barren land?

a)

Primary Succession

b)

Secondary Succession

30.

Which of the following is something that can create new land?

a)

Snow

b)

Rain

c)

Volcanic Eruption

d)

Wind

31.

What do we call the first species that colonize a new area?

a)

Foreign Species

b)

Pioneer Species

c)

Intraspecies

d)

Interspecies

32.

Which of the following are examples of pioneer species? (select all that apply)

a)

Maple Tree

b)

Grass

c)

Lichens

d)

Moss

33.

Which type of succession occurs after some kind of natural disaster wipes out most of the vegetation in a habitat?

a)

Primary Succession

b)

Secondary Succession

34.

Which type of succession is quicker?

a)

Primary Sucession

b)

Secondary Succession

35.
What is the thing that makes the planets orbit
a)
Jupiter
b)
Neptune
c)
Sun
d)
God
36.

Which of the following is an accurate model of how the Sun, Earth, and Moon move?

a)

Sun and moon orbit Earth

b)

Earth and moon orbit Sun

c)

Earth orbits the Sun and the moon orbits Earth

d)

Earth and sun orbit moon

37.
One full orbit of an object around another object is called a ________.
a)
axis
b)
rotation
c)
revolution
d)
satellite
38.
Select the order from smallest to largest.
a)
Sun, Milky Way, solar system, universe
b)
Sun, Milky Way, universe, solar system
c)
Sun, solar system, Milky Way, universe
d)
Sun, solar system, universe, Milky Way
39.
Day and night is caused by the _____________ of earth on its axis.
a)
revolution
b)
orbit
c)
rotation
40.

How many stars are located in our Solar System?

(a)  

41.

A complex system of garments that allow astronauts to work safely outside their spacecraft.

a)

Astronaut

b)

Space walk

c)

Space suit

d)

Micrometeoroid

42.

The condition in which people or objects appear to be weightless.

a)

Gravity

b)

Space walk

c)

Mass

d)

Microgravity

43.

Which of the following accommodations on the space station is used by astronauts to combat the effects of microgravity on their bones?

a)

Special handles

b)

Velcro® straps

c)

Exercise equipment

d)

Oxygen system

44.

Spacesuits have layers that have high capacity for thermal insulation in order to -

a)

regulate body temperature in the extremes of space.

b)

prevent the spread of bacteria which thrive in space.

c)

allow communication with the space station.

d)

prevent the astronaut from sweating inside the suit.

45.

Is necessary for life as we know it.

a)

distance from the sun

b)

magnetic field

c)

atmosphere

d)

water

46.

Affects temperature of a planet.

a)

distance from the sun

b)

magnetic field

c)

atmosphere

d)

water

47.
What is the habitable zone?
a)
A zone with the correct distance away from a star
b)
A zone in space where water turns into vapor
c)
A zone where life can not be sustained
d)
A zone in space where water is frozen
48.

Check all of the agents of weathering.

a)

wind

b)

water

c)

gravity

d)

ice

49.

A beautiful display of bluebonnets bloomed along the bank of the river, but after the storm last night, the flowers and a large section of the soil in which they grew is gone. What is this an example of?

a)

weathering

b)

erosion

c)

deposition

50.

Which process drops sediment off in a new location?

(a)  

51.

Why did the white ones start to disappear?

a)

The coal turned the white moths black

b)

They are actually different species and the white ones went extinct

c)

The white ones got a disease that the black ones didn't

d)

Predators ate the white ones at a higher rate.

52.

(a)   is the variety of living things in the world.

53.

How do biodiversity and stability work together?

a)

The lower the biodiversity the greater the stability of an ecosystem.

b)

The higher the biodiversity, the less stable the ecosystem

c)

The higher the biodiversity, the greater the stability of the ecosystem.

d)

Biodiversity has nothing to do with ecosystem stability.

54.
High biodiversity is 
a)
having a lot of the same organism.
b)
having a few of the same organism.
c)
having a lot of variety of different organisms.
d)
only having one of each organism. 
55.

Which ecosystem is more likely to survive a change in the environment?

a)

One with High biodiversity

b)

One with Low biodiversity

56.
Which habitat exhibits the greatest biodiversity?
a)
A habitat with 15 different species with about 300 individuals each
b)
A habitat with 10 different species with about 75 individuals each
c)
A habitat with 4 different species with about 150 individuals each
d)
A habitat with only one species with about 2000 individual
57.

What is the starting source of energy for all food chains?

a)

grass

b)

sun

c)

bug

d)

mushrooms

58.
What do the arrows represent in a food chain?
a)
Stop
b)
Start
c)
"Gives energy to"
59.

A feature that allows an organism to survive its environment is called what?

a)

Evolution

b)

Adaptation

c)

Trait

d)

Survivability factor

60.

Which of the following examples are of behavioral adaptations?

a)

Migration

b)

Claws

c)

Teeth

d)

Eyes

61.

Which of the following are examples of structural adaptations?

a)

Hibernation

b)

Migration

c)

Eyes

d)

Mating calls

62.
Some grasses grow in hot dry areas. Why might they grow deep roots?
a)
to protect the plant from sun damage
b)
to take in as much light as possible
c)
to spread seeds to new places
d)
to reach water down below
63.
Base your answer(s) to question(s) on the diagram below and on your knowledge of biology. The diagram shows the heads of four different species of Galapagos Islands finches. 
 The four different types of beaks shown are most likely the result of 
a)
gene manipulation 
b)
natural selection 
c)
unchanging environmental conditions 
d)
patterns of behavior learned from parents 
64.
Which characteristic is necessary for natural selection to occur in a species? 
a)
stability 
b)
variation 
c)
complex cellular organization 
d)
a very low mutation rate 
65.
What is the advantage of having different shaped beaks?
a)
To look different from other species.
b)
To be able to eat the food readily available in the environment.
c)
To protect itself against predators.
d)
To protect itself against prey.
66.
An illustration and a dichotomous key are given. What is the correct classification for this organism?
a)
Class Insecta
b)
Order Amblygygi
c)
Order Araneae
d)
Order Scorpiones
67.
When using a dichotomous key to identify organisms, what do we look at?
a)
physical features
b)
weather patterns
c)
environment
d)
diet
68.

something that causes a response is called a

a)

response

b)

stimulus

c)

touch

d)

survival

69.

Hunger, thirst, fever or vomiting are what type of stimuli?

a)

external

b)

internal

70.

When roots of a plant grow downward in response to the stimulus of gravity it is called...

a)

phototropism

b)

geotropism

c)

thigmotropism

d)

homeostasis

71.

the body's ability to regulate its inner environment in response to changes in the outside environment is called...

a)

phototropism

b)

homeostasis

c)

response

d)

warm

72.

An organisms special survival instinct to threat is called

a)

learned or flight response

b)

instinct or fight response

c)

fight or flight response

d)

instinct or learned response

73.

An example of an external stimulus would be...

a)

You want a drink of water

b)

You are hungry

c)

You feel nauseated

d)

You get cold when you walk outside

74.

Every living thing has genetic information stored in the form of

a)

Ribosomes

b)

DNA

c)

Chloroplast

d)

Mitochondria

75.

Chromosomes are

a)

Found in the mitochondria

b)

Made of 20 pairs

c)

Long strands of DNA that contain many genes

d)

Bundles of DNA that contain only one gene each

76.

Sections of DNA that have instructions for a specific trait are called _______________

a)

Blueprints

b)

Genes

c)

Heterozygous

d)

Fragments

77.

The passage of genetic instructions from one generation to the next is known as

a)

Alleles

b)

Ancestry

c)

Heredity

d)

Variation

78.

Which results in offspring that are genetically unique and display a combination of traits from each parent?

a)

Sexual

b)

Asexual

c)

Neither

d)

Both

79.

Which type of reproduction results in offspring that are identical to the parent?

a)

Sexual

b)

Asexual

c)

Neither

d)

Both

80.

Sexual, Asexual, or Both?

a)

Sexual

b)

Asexual

c)

Both

d)

Neither

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