Duplicate of 8th Grade Science Review | Baamboozle - Baamboozle

52 Public

Review for 8th grade Science EOG - Released test 2013

Study Slideshow

Which would best allow a species to survive environmental changes?

small population

genetic diversity

similar physical features

low mutation rate

15

How does smoking have a negative impact on the ability to succeed at physical activities?

It decreases the speed and power of muscle contractions.

It interferes with balance and coordination?

It decreases stamina and cardiovascular efficiency.

It decreases the ability to make decisions rapidly.

15

Which shows one example of a physical change & one example of a chemical change?

dissolving powder and shredding paper

freezing water and burning coal

boiling water and melting wax

rusting iron and baking a cake

15

How does a balanced chemical equation satisfy the Law of Conservation of Mass?

During a chem reac, the total number of atoms increases.

During a chemical reaction, matter is destroyed

During a chem reaction, the total amt of matter stays same

During a chem reaction, 1 or more new substances are formed.

15

Which is a problem with using wind turbines to produce energy?

Wind turbines create a large amount of pollution.

Wind turbines are efficient only in certain areas.

Wind turbines occupy a small area of land.

Wind turbines produce a large amount of energy.

15

Which best describes the characteristiscs of a river basin?

land at the mouth of a river where H2O flows i/t the ocean

the land drained by a river and its tributaries

the land formed when rivers creat estuaries and marshes

the land formed as a result of a river flooding

15

Which factors can have the greatest effect on the health of a river system?

natural disasters and tidal changes

human consumption and pH

nitrate levels and turbidity

type of soil and salinity

15

In the U.S., which is responsible for ensuring the safety of the country's drinking water?

Food and Drug Administration (FDA)

National Oceanic and Atmospheric Administration (NOAA)

Environmental Protection Agency (EPA)

Center for Disease Control (CDC)

15

Which statement best describes the Law of Superposition?

Rocks that form near volcanoes are older than other rocks.

In Sedimentary rock, the lowest layers are the older rocks.

The upper rock layers are older than the lower rock layers.

Each sedimentary layer of rock repres. 1,000 yrs Earths age

15

What do earthquakes tell scientists about the history of the planet?

Earth's climate is constantly changing.

The oceans are much deeper today than millions of years ago.

The continents of Earth are continually moving.

Dinosaurs became extint about 65 million years ago.

15

How do scientists know that some mountains were once at the bottom of the ocean?

Fresh rivers flow to the ocean.

Dinosaur  have bones have been discovered in the mountains.

Marine fossils have been found on the peaks of some mtns.

Saltwater fish are found in some mountain streams.

15

Malaria is a common disease in many countries. What is the cause of this disease?

a fungus

a virus

a parasite

a bacterium

15

How can the rate of an infectious disease be drastically reduced?

by preventing transmission between people

by wearing clean clothing

by taking medication daily

by performing dental hygiene three times each day

15

What is involved in creating genetically modified bacteria?

growing them on selected plants

allowing them to reproduce freely

changing their food source

using biotechnology techniques

15

In a food pyramid, why does the # of organisms decrease from 1 trophic level to the next?

Consumers at low lvls require more energy than top lvls.

Consumers are feeding on larger orgs. that have less energy.

Consumers at the top lvl require more energy than low lvls.

Consumers are feeding on smaller orgs. that have less energy

15

What process is most responsible for extinction of most species of plants and animals on Earth?

environmental changes

decrease in reproduction

gene mutation

selective breeding

15