can you pls answer this quickly i dont have time and i dont get it

Answer: The Shape of Molecules

   The three dimensional shape or configuration of a molecule is an important characteristic. This shape is dependent on the preferred spatial orientation of covalent bonds to atoms having two or more bonding partners. Three dimensional configurations are best viewed with the aid of models. In order to represent such configurations on a two-dimensional surface (paper, blackboard or screen), we often use perspective drawings in which the direction of a bond is specified by the line connecting the bonded atoms. In most cases the focus of configuration is a carbon atom so the lines specifying bond directions will originate there. As defined in the diagram on the right, a simple straight line represents a bond lying approximately in the surface plane. The two bonds to substituents A in the structure on the left are of this kind. A wedge shaped bond is directed in front of this plane (thick end toward the viewer), as shown by the bond to substituent B; and a hatched bond is directed in back of the plane (away from the viewer), as shown by the bond to substituent D. Some texts and other sources may use a dashed bond in the same manner as we have defined the hatched bond, but this can be confusing because the dashed bond is often used to represent a partial bond (i.e. a covalent bond that is partially formed or partially broken). The following examples make use of this notation, and also illustrate the importance of including non-bonding valence shell electron pairs (colored blue) when viewing such configurations .

Methane Ammonia Water

Bonding configurations are readily predicted by valence-shell electron-pair repulsion theory, commonly referred to as VSEPR in most introductory chemistry texts. This simple model is based on the fact that electrons repel each other, and that it is reasonable to expect that the bonds and non-bonding valence electron pairs associated with a given atom will prefer to be as far apart as possible. The bonding configurations of carbon are easy to remember, since there are only three categories.

Explanation:

What happens to a sheet of copper as the average kinetic energy of the copper molecules decreases?

It melts.
It expands.
It gets cooler.
It gains energy.

Which statement describes the roles of photosynthesis and respiration in the oxygen cycle?

Photosynthesis and respiration both put oxygen into the atmosphere.

Photosynthesis removes oxygen from the atmosphere, and respiration puts oxygen into the atmosphere.

Respiration and photosynthesis both remove oxygen from the atmosphere.

Respiration removes oxygen from the atmosphere, and photosynthesis puts oxygen into the atmosphere.

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FREE BRAINLIEST IF CORRECT (FILL IN THE BLANKS

Hard materials such as brick walls tend to (blank)
sound waves while soft materials such as a thick carpet tend to (blank)
sound waves.

Please tell me witch one goes with what. It can be continental drift or plate tectonics. please tell me if you need help
1.Identify evidence that supports the theories of continental drift and plate tectonics.
2. Glossopteris plant found in several southern hemisphere continents.
3.The same rocks are found on either side of the Atlantic Ocean.
4.There are no ocean floor rocks older than 180 million years. The pattern of rock ages 5. shows new rock forming at mid-ocean ridges and spreading away from the ridge in both directions.
6. The shapes of South America and Africa appear to fit together.
7. The majority of earthquakes and volcanoes occur along easily recognized bands called tectonic plate boundaries.
8. Lystrosaurus reptile fossils are found on several Southern Hemisphere continents.
9. The same type of sediment deposits are found in several southern continents.
10. Magnetism in rocks of different ages don't point to the same North Pole locations.

Can someone help please I just need the answer....

Calculate the speed of a wave that has a wavelength of 8 meters and a frequency of 16 meters per second (m/s).

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Can somebody please match the numbers?

NEED LIKE RIGHT NOW ASAP (NO LINKS PLEASE) THANK YOU

what is a wave and how it transverses energy

the table lists the speed of the light in four different materials at the temperature.

Which structures help plants control the rate of transpiration to prevent withering and eventual death?


chloroplasts and pores

chloroplasts and guard cells

guard cells and stomata

stomata and pores

Practice It!

NASA believes that technology drives exploration. This means that advancements in technology lead to advancements in space exploration. Over the past 60 years, we have developed technology to leave Earth's surface, orbit the planet, reach the Moon, take exceptional pictures of celestial objects, and complete remote fly-by's of outer planets. In the future, technology could lead us to visiting other planets, live and work in deep-space, or even leaving our own galaxy.

Select the statement(s) that illustrate why developing space technology is important.


Technology in space helps us in our everyday lives here on Earth.


Space exploration technology has helped us explore the Moon and see images of far off galaxies.


Technology allows us to better understand our world so that we can make it better.


Technology only helps scientists while they are doing experiments.


Space technology may help us inhabit another planet or live in space in the future.

please answer ill give brainliest

Which substances are the products of photosynthesis?

oxygen and water

glucose and oxygen

glucose and carbon dioxide

oxygen and carbon dioxide

help me ill give you brainilest
(easy answer I'm in 5th grade T_T)
Bob thinks that plants get their materials for growth from the soil. Write a couple of sentences to explain why is Bob incorrect. (2 points)

The color of a planet provides clues to its composition. From space, much of Earth looks blue because most of its surface is covered with water. The surface of Mars is much different from that of Earth. Much of its surface is made up of iron oxide, or "rust." Which color would you expect Mars to be?

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Rocks can be weathered by expanding and _________ .

contacting
contracting
conducting
compacting

Complete the following sentence.
Scientists who study the relationship between parasites and hosts are called

What would be the approximate time would at Location X? (Please make note of which direction Earth is spinning.)

A. 5:00 AM
B. 1:00 PM
C. 8:00 PM
D. 2:00 AM

Help me ill give you brainilest
(easy answer I'm in 5th grade T_T)
Bob thinks that plants get their materials for growth from the soil. Write a couple of sentences to explain why is Bob incorrect. (2 points)

What is the relationship between guard cells and stomata in plants?

Guard cells open and close the stomata to regulate the rate of transpiration.

Guard cells protect the stomata from insects and other pests.

Guard cells store carbon dioxide for later use by the stomata.

Guard cells absorb light energy from the Sun for use by the stomata.

Can someone help me with this


why do you think mauna loa erupts periodically instead of steadily

Which of the following is a way to increase the solubility of a solid in water? Select all that apply.(PLEASE HELP ME! THIS IS TIMED)
(THERE IS MORE THAN ONE CORRECT ANSWER)

A.letting the mixture stand still for a long time

B.shaking the mixture of solid and water

C.raising the temperature of the water

D.crushing the solid

he diagram shows changes of state between solid, liquid, and gas. The atoms of a substance lose energy during a change of state. Before the change, the atoms are close together but are able to slide past one another.

A diagram has a triangle at center with gas on top, liquid on bottom right, solid on bottom left. An arrow from gas to liquid is labeled O, and an arrow from liquid to gas is labeled N. An arrow from solid to liquid is labeled P, and an arrow from liquid to solid is labeled Q. An arrow from solid to gas is labeled L, and an arrow from gas to solid is labeled M.

Which arrow represents the change of state described above?

M
N
P
Q

PLEASE HELP NO LINKS OR WEBSITES IF YOU DONT KNOW LEAVE ME ALONE THANKS THIS IS DUE IN 30 MINUTES

FREE BRAINLIEST IF CORRECT

Bats and marine mammals are able to locate prey and to communicate by sending and receiving soundwaves that echo off of surfaces. Echoes demonstrate the wave property of?

Brainliest if correct LINKS WILL BE REPORTED

12a. How does the model of the volcano provide evidence for the cycling of Earth materials through the rock cycle?

12b. Explain how the process you described in 12a results in rock formation.​

The data shows that recently the size of the raccoon population decreased. How will the decrease in the raccoon population affect the other populations? Be sure to explain whether the owl population, the duck population, and the frog population will change, and why. PLEASE HELP (science by the way!!!)