science review enrichment

Multiple Choice

A habitat is home to a tangle of food chains called ___

• a nutrient hub

• an energy chain

• a food web

• the carbon cycle

Multiple Choice

The interaction of living and non-living things in a habitat is called ___

• an environment
• an ecosystem
• a food web
• a food chain

Multiple Choice

Leopards dine on ___

• figs and spider monkeys
• sloths and strangler figs
• sloths and spider monkeys
• ants and bats

Multiple Choice

What is a producer?

• an organism that gets energy from eating other organisms
• an organisms that uses sunlight to make its own food
• an organism that gets energy from eating dead organisms, non-living material or waste
• an organism that uses chemical energy to make its own food

Multiple Choice

The arrows in a food chain or web represents what?

• They point to the organism that is being eaten.
• It shows how sunlight flows within an ecosystem.
• They show what direction the energy is flowing between organisms. 
• They represent how water is transferred within a habitat.

Multiple Choice

A copper penny turning greenish after a few years is an example of ...

• Chemical Change
• Physical Change

Multiple Choice

To go back to the substances original states is not possible or you would need to use chemicals. 

• Chemical
• Physical

Multiple Choice

A change in matter that forms one or more new substances with new chemical properties is a/an...

• Physical Change
• Chemical Change

Multiple Choice

Which Law states that Matter cannot be created or destroyed during a Chemical Change/Reaction?

• Conservation of Energy
• Conservation of Matter (Mass)
• Conservation of Momentum
• Conservation of Thermodynamics

Multiple Choice

The diagram below shows changes happening to water in a specially shaped bottle.
What changes did the water undergo?

• melting and then freezing
• freezing and then evaporation
• condensation and then melting
• evaporation and then condensation

Multiple Choice

All of the following are examples of tissue except...

• organ
• muscle
• connective
• epithelial

Multiple Choice

Which of the following is an example of homeostasis?

• taking out the trash
• drinking water
• sweating on a hot day
• taking a shower

Multiple Choice

Which body system gets oxygen from the environment and removes carbon dioxide and other wastes from the body?

• Circulatory
• Respiratory
• Digestive
• Skeletal

Multiple Choice

The smallest unit that is a building block for all life.

• tissue
• organelle
• cell
• molecule

Multiple Choice

Which system transports materials from the digestive system and respiratory system to the cells?

• circulatory
• respiratory
• digestive
• skeletal

Multiple Choice

"For every action, there is an equal and opposite reaction."

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• Newton's 4th Law

Multiple Choice

Force = Mass x Acceleration

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• Newton's 4th Law

Multiple Choice

"An object in motion (or at rest) will to stay in motion (or at rest) until an outside force acts upon it."

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• Newton's 4th Law

Multiple Choice

A magician pulls a tablecloth out from under dishes and glasses on a table without disturbing them.

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law

Multiple Choice

A person not paying attention while skateboarding hits a rock. The skateboard stops...they don't.

• The Law of Inertia (1st law)
• The Law of Acceleration (2nd law)
• The Law of Conservation of Momentum
• Action Reaction Law (3rd law)

Multiple Choice

With unbalanced forces, the object will move in the direction that the _______ force is being applied.

• larger 
• smaller 
• equal 
• less

Multiple Choice

8 N to the left , and 4 N to the right. Find the net force. Is this balanced 

• 12 N Right  No
• 4 N Left  No
• 12 N Right  Yes
• 4 N Left  Yes

Multiple Choice

8 N to the left , and 4 N to the right. Find the net force. Is this balanced 

• 12 N Right  No
• 4 N Left  No
• 12 N Right  Yes
• 4 N Left  Yes

Multiple Choice

Newton's third law states that any action will have a(n) _______ and ______ reaction

• Equal and similar
• Equal and opposite
• Equal and different
• Greater and opposite

Multiple Choice

Is digestion an example of a physical change or a chemical change?

• Physical Change
• Chemical Change

Multiple Choice

Is rust forming on a bike that has been left outside in the rain an example of a physical or chemical change?

• Physical Change
• Chemical Change

Multiple Choice

A change in mass is an indication of which type of change?

• Physical Change
• Chemical Change

Multiple Choice

Your teacher gives you a tray full of building blocks. If you weigh the tray of blocks before you start building a house and after you are done building a house, will the blocks weigh the same or different? Why?

• They will weigh the same. This is a physical change.
• They will weigh the same. This is a chemical change.
• They will weigh less. This is a physical change.
• They will weigh more. This is a physical change.

Multiple Choice

The vertical (up and down) columns in the Periodic Table are called

• groups

• towers

• periods

• atomic numbers

Multiple Choice

The Modern Periodic Table of Elements is arranged by

• atomic mass
• atomic number
• valence electrons
• number of isotopes

STAAR 8TH SCIENCE REVIEW

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Multiple Choice

If a cube has a mass of 50 grams and a volume of 10cc, what is its density?

• 10/50 = .2 cc/g

• 10cc x 50 g = 500 gcc

• 50g/10cc = 5 g/cc

• not enough information

Multiple Choice

What is the speed of a car travelling 50m in 4s?

• 200 m/s

• 12.5 m/s

• 12.5 m

• 200m

Multiple Choice

Which skier has 100% potential energy?

• A

• B

• C

Multiple Choice

Sarah observes and records these moon phases.

Which phase will she observe on Night 15?

• A

• B

• C

• D

Multiple Choice

The tilting of the Earth on its axis contributes to:

• the different phases of the moon we see

• the changing of seasons as Earth moves around the Sun

• high and low ocean tides

• an increase in the gravitational force from the Sun

Multiple Choice

What phase comes BEFORE this one?

• Waxing Crescent

• Waxing Gibbous

• Waning Gibbous

• Waning Crescent

Multiple Choice

Which is the correct formula for:

three hydrogen (H)

one sulfur (S)

four oxygen (O)

• H₃SO₄

• HSO₄

• H₄S₃O

• H₂O

Multiple Choice

What is found in the nucleus of atoms?

• Protons and electrons.

• Protons, neutrons, and electrons.

• Protons and neutrons.

• Neutrons and electrons.

Multiple Choice

Which is an electron?

• A

• B

• C

Multiple Choice

Mechanical Energy is transferred to _____ Energy.

• Solar

• Mechanical

• Electrical

• Potential

Multiple Choice

What is happening at A?

• Stationary

• Accelerating

• Slower steady speed; moving away from the starting position

• Steady speed; returning to start position

Multiple Choice

<--------8N 4N-------->

• 2N

• 12N

• 4N

• 32N

Multiple Choice

A baseball bat hits a baseball with a force of 100 Newtons. What is the force and its direction exerted by the ball on the bat?

• 100 Newtons, same direction

• 100 Newtons, opposite direction

• 200 Newtons, opposite direction

• 200 Newtons, same direction

Multiple Choice

How is this an example of Newton's Third law

• Only the ball is using the head

• only the head is pulling the ball

• They are both exerting an equal force on each other

Multiple Choice

Which of the following components of the universe is best described a system of stars, gases, and dust held together by gravity?

• a nebula

• a planet

• a meteor

• a galaxy

Multiple Choice

Which of the following describes a nebula?

• A cloud of gas and dust where new stars form

• An oval-shaped cluster of densely packed stars

• An explosion at the end of a giant star’s life

• A star and all the planets that revolve around it

Multiple Choice

A system of stars, gas, dust, and dark matter bound together by gravity is called -

• an asteroid

• a moon

• a galaxy

• a nebula

Multiple Choice

If the new moon must always be between the sun and Earth where should a student put the "sun"

• Position 1

• Position 2

• Position 3

• Position 4

Multiple Choice

Name the phase of the moon for letter a

• First Quarter

• Last Quarter

• Waxing Gibbous

• Waning Gibbous

Multiple Choice

Name the phase of the moon for letter a

• First Quarter

• Last Quarter

• Waxing Gibbous

• Waning Gibbous

Multiple Choice

Which side of this island is the steepest?

• South

• North

• East

• West

Multiple Choice

Match the topographic map to its profile.

Multiple Choice

It is steep on a topographic map where __________.

• lines are closest together

• a river flows into a lake

• contours bend

• contours are far apart

Multiple Choice

Which of the following best describes the tilt of the earth when it is summer in the southern hemisphere?

• The northern hemisphere is tilted toward the sun

• The northern hemisphere is tilted away from the sun

• The southern hemisphere is tilted toward the sun

• The southern hemisphere is tilted away from the sun

Multiple Choice

What does the earth's tilt cause?

• The seasons

• Day and Night

• Tsunamis

• Earthquakes