energy sources

Question 1

Three advantages to using biomass as fuel are

Answer 1

it has large potential in some areas,
plantations can help restore lands that are degraded
it can make use of agricultural and urban waste products

Question 2

What is the best free energy source?

Answer 2

Solar

Question 3

What is the main leading source of renewable energy?

Answer 3

hydropower

Question 4

Wind power and water power both generate electricity by turning ____ _________ and _____ ______

Answer 4

turbines and generators

Question 5

___ is not a benefit to using geothermal energy.

Answer 5

non-toxic emissions turn into water vapor

Question 6

A very controversial form of energy is ________________ power.

Answer 6

nuclear

Question 7

One of the benefits to conventional oil is _______________

Answer 7

it has a high net energy yield

Question 8

_____ is not an advantage of nuclear power

Answer 8

there is a high net energy yield

Question 9

Some of the problems with coal include ______________________.

Answer 9

it has high CO2 emissions when it is burned,

it is a severe threat to human health

Question 10

Synthetic fuels are ________- made energy sources

Answer 10

man

Question 11

what is weathering?

Answer 11

the changing of rocks at the Earth’s surface due to exposure to certain variables

Question 12

when water freezes it expands

Answer 12

10%

Question 13

The heating and cooling of rocks causes them to expand and contract. When this happens, pieces of rock flake off in a process called _________________________. It can also happen from pressure being released on the surface.

Answer 13

exfoliation

Question 14

carbonic acid

Answer 14

is a weak acid that occurs naturally

Question 15

A marble statue is in a botanical garden near a factory that produces sulfur dioxide. What will most likely happen to the statue over time?

Answer 15

the statue will start to deteriorate due to the effects of acid rain

Question 16

What are two forms of physical weathering?

Answer 16

wind and gravity

Question 17

Underground caves form from ________________________.

Answer 17

water seeping down, forming carbonic acid, dissolving the limestone

Question 18

In what type of environment would limestone be chemically weathered?

Answer 18

moist and hot; moist and cold

Question 19

When lichen and moss grow on rocks they begin the process of ____________.

Answer 19

biological weathering due to pressure

Question 20

How do giant piles of rounded rock form?

Answer 20

they get cracks from freeze - thaw cycles;
they become more rounded through exfoliation;
clay minerals in the rock wash away;
they experience ice wedging;
flash floods wash away the rock debris in between;
wind blows away smaller fragments