Question

Which of the following statements is true?

Energy can be created but not destroyed.
Energy cannot be created, but it can be transformed.
Energy ceases to exist if it is not used.
When energy is used up, it no longer exists.

Answer 1

@AlexandervonHumboldt2

Answer 2

`In physics, the law of conservation of energy states that the total energy of an isolated system remains constant—it is said to be conserved over time. Energy can be neither created nor be destroyed, but it transforms from one form to another, for instance chemical energy can be converted to kinetic energy in the explosion of a stick of dynamite.`

Answer 3

In which of the following situations would a line graph be best?

Showing how many different ways data can be grouped.
Showing how large a sample is.
Showing the relationship between two sets of data.
None of these

Answer 4

hmm i think A but not sure

Answer 5

ok 1sec

Answer 6

Refraction is

the bending of light as it passes from one material to another
when light appears to bounce off an object
when light changes colors
when the wavelength of light is compressed

Answer 7

`Refraction is the bending of a wave when it enters a medium where its speed is different. The refraction of light when it passes from a fast medium to a slow medium bends the light ray toward the normal to the boundary between the two media.`

Answer 8

so A?

Answer 9

i think so

Answer 10

The purpose of a scientific investigation may include the

conclusion
analysis
hypothesis
theory

Answer 11

the first thing is the question and hypotesis

Answer 12

c?

Answer 13

i guess so

Answer 14

What would be the appropriate measure to record the length of a car?

Millimeters
Meters
Kilometers
Centimeters

Answer 15

what do you think?

Answer 16

b

Answer 17

yeah

Answer 18

Which of the following types of electromagnetic radiation can cause harm to living tissue?

Radio waves and infrared light
Gamma waves and ultraviolet waves
Gamma waves and infrared light
Ultraviolet waves and infrared waves

Answer 19

https://en.wikipedia.org/wiki/Ultraviolet
https://en.wikipedia.org/wiki/Gamma_wave

Answer 20

b

Answer 21

The distance from the crest of one wave to the crest of the next wave is the wave’s

frequency
fluctuation pattern
spectrum
wavelength

Answer 22

yeah

Answer 23

The distance from the crest of one wave to the crest of the next wave is the wave’s

frequency
fluctuation pattern
spectrum
wavelength

Answer 24

i thiink its D

Answer 25

yeah D

Answer 26

Folded mountains are formed

at convergent boundaries
as a result of lava outflows
from pressure pushing up on a plate
with a cone on top

Answer 27

think its C

Answer 28

correct

Answer 29

A volcano made from particles and globs of lava thrown from a single opening in the crust is a _______ volcano.

dome
fault-block
shield
cinder cone

Answer 30

`A cinder cone or scoria cone is a steep conical hill of loose pyroclastic fragments, such as either volcanic clinkers, cinders, volcanic ash, or scoria that has been built around a volcanic vent.[1][2] They consist of loose pyroclastic debris formed by explosive eruptions or lava fountains from a single, typically cylindrical, vent. As the gas-charged lava is blown violently into the air, it breaks into small fragments that solidify and fall as either cinders, clinkers, or scoria around the vent to form a cone that often is beautifully symmetrical; with slopes between 30-40°; and a nearly circular ground plan. Most cinder cones have a bowl-shaped crater at the summit.[1]`

Answer 31

so D

Answer 32

yeah