Practice makes Perfect

Question 1

The SI metric unit used to record the heat transfer of a solution in an investigation is

Accepted Answer

Degrees Celsius

Question 2

Why can you sometimes see yourself in the glass of a regular window?

Accepted Answer

Some of the light was reflected off the surface of the glass

Question 3

What would happen to otters if their food source of shellfish was reduced due to pollution?

Accepted Answer

experience a population decline

Question 4

Which of the following best explains why static electricity builds up in the clothes dryer?

Accepted Answer

Electrons are transferred as clothes rub against each other

Question 5

The best way to test the hypothesis that ice melts faster in the microwave than on the stove

Accepted Answer

The time for each ice cube to completely change to a liquid.

Question 6

How would it affect bears (which claim large territories) if we built a shopping center in one?

Accepted Answer

Reduce the black bears’ habitat

Question 7

What info do you need to test the hypoth. that states w/ more sunny days use more solar energy?

Accepted Answer

The # of sunny days/yr and the amount of solar power used/yr

Question 8

What is one advantage of using a hydroelectric plant?

Accepted Answer

It provides renewable energy to human populations.

Question 9

Which energy transformation occurs first in a coal-burning power plant?

Accepted Answer

Chemical energy to thermal energy

Question 10

A coal-burning plant is built near ponds. How will this most likely the affect pond ecosystems?

Accepted Answer

Water quality will be reduced.

Question 11

Which of the following is a nonrenewable energy source?

Accepted Answer

Coal burning power plant, Oil refinery

Question 12

It is important to protect air quality because —

Accepted Answer

acid rain is caused by air pollution

Question 13

What piece of equipment would a student use to count the microbes in a sample of pond water?

Accepted Answer

Microscope

Question 14

What best explains why the pop and the spray of fireworks do not seem to occur at the same time

Accepted Answer

Sound travels slower than light.

Question 15

A student draws carbon atom. Which of these should be in the nucleus of the atom?

Accepted Answer

Neutrons, Protons

Question 16

Choose all of the PRODUCTS of a neutralization reaction--

Accepted Answer

Salt, Water

Question 17

The average distance from Earth to the Moon (384,401 km) expressed in scientific notation is:

Accepted Answer

3.84 x 105 km

Question 18

Students conducted an investigation to see if liquids were acids or bases. What is the IV?

Accepted Answer

Sample

Question 19

Which of the following is a step in the process of cloud formation?

Accepted Answer

Condensation of water vapor

Question 20

What is the role of the Orca in this food chain?

Accepted Answer

Third-order consumer

Question 21

Energy from the Sun is distributed around the Earth by

Accepted Answer

Radiation and convection

Question 22

According to this equation, what happened to the carbon and oxygen?

Accepted Answer

They combined chemically to form a new compound.

Question 23

A car's weight is reduced by 450 kg. How would the new design compare to the old one?

Accepted Answer

It will need less force to move.

Question 24

Based on the scale, which of the following is the most accurate diameter of Mercury?

Accepted Answer

5,000 km

Question 25

Which of the following best describes why the Moon orbits Earth?

Accepted Answer

The gravitational attraction between the Moon and Earth

Question 26

The cell parts that are found only in plant cells are (more than one):

Accepted Answer

Cell wall, Chloroplasts, Central Vacuole

Question 27

Human sweat is the direct result of which life functions?

Accepted Answer

Waste removal and temperature contro

Question 28

What is the reading of this triple beam balance?

Accepted Answer

542.4 g

Question 29

Which characteristic isusedto classify frogs in a diff phylum fromsquid, snails, and jellyfish?

Accepted Answer

Frogs have backbones

Question 30

Best describes the particle motion taking place as CO2 gas is exposed to freezing temperatures

Accepted Answer

The particles decrease in speed.

Question 31

Which gas do animals need to carry out life processes?

Accepted Answer

Oxygen

Question 32

Where is water most likely to become contaminated?

Accepted Answer

Near a cattle farm

Question 33

Lab groups tested how far rubber bands stretched.Whatis the range of data collected for band B?

Accepted Answer

.3 cm

Question 34

All of these can be inherited by people EXCEPT-

Accepted Answer

language

Question 35

Which 2 of the following are examples of potential energy?

Accepted Answer

Picture A, Picture D

Question 36

Earth is different from the other planets in our solar system because it —

Accepted Answer

has oceans and lakes

Question 37

Which of these substances is an element?

Accepted Answer

Chlorine

Question 38

Chloroplasts are found only in organisms that are able to —

Accepted Answer

generate their own energy

Question 39

Which of the following is an example of static electricity?

Accepted Answer

A ballon sticks to a wall after rubbing with a piece of wool

Question 40

How is the modern model of an atom different from the Bohr atomic model?

Accepted Answer

The arrangements of the electrons are different.

Question 41

Where would the moon be during a solar eclipse?

Accepted Answer

"New Moon" position

Question 42

What information shouldbe used for the column headings marked X for this data table?

Accepted Answer

Trial number

Question 43

Which of these is required tocomplete the equation for photosynthesis?

Accepted Answer

Oxygen

Question 44

Which are the products of combustion?

Accepted Answer

Heat and light

Question 45

Why are there harvesting regulations to limit the number and size of fish that can be kept?

Accepted Answer

To keep a healthy population of adult fish

Question 46

The illustration shows a wave. The wave’s wavelength is the distance between points —

Accepted Answer

2 and 4

Question 47

For separate ecosystems to be classified as the same type of biome,they must —

Accepted Answer

have similar organisms and climates

Question 48

The line graph shows five years of data about a dog. What information does the graph show?

Accepted Answer

How the mass of the dog changed

Question 49

The BEST reason for a scientist to accept a specific theory is--

Accepted Answer

that research and observations support the theory

Question 50

Two resources that are renewable and available in VA are--

Accepted Answer

wind power and solar power

Practice makes Perfect

Questions 50

Practice makes Perfect

Questions 50