A standard room temperature and pressure, most of the elements on the periodic table are
explain answer

What is the main difference between active and passive transport?

How are reactivity patterns on the periodic table related to an element's use in everyday applications?

What is a change in matter that produces one or more substances?

Phenomenon: The sun appears to move across the sky during the day, and stars appear to move across the sky during the night.

1. What questions do you have about this phenomenon?

What caused Hawaii to form?
a tsunami
a hot spot
an earthquake
the San Andreas fault

Which of the following methods can be used to completely separate a solution containing alcohol and water?

Evaporation and distillation
Filtration
Floatation or centrifuge
Magnetism

what is c30h32n8o10 stand for in science

Can someone please help and hurry

Read the article "Chicago's International Airports" and answer the question.

Chicago is a transportation hub. There are several airports in or near the city. O'Hare International and Midway International are two of the busiest airports in the area. They share many similarities and have some key differences.The city's busiest airport is O'Hare International Airport. It is located northwest of downtown Chicago. To travel between the airport's four terminals, passengers use the automated Airport Transit System. These trains travel over 2.7 miles of track and can carry 2,400 passengers in an hour. Other options for moving between terminals include the pedestrian tunnels and the Terminal Transfer Bus. O'Hare has about 1,028 direct domestic flights and 126 direct international flights each day. In contrast to O'Hare, Midway International Airport is a relatively small airport located southwest of downtown Chicago. The airport only has three concourses, making travel between gates easy and efficient. The facility has approximately 238 direct domestic flights and 12 direct international flights each day.

Both airports feature a variety of artwork, restaurants, and activities for people to experience. The Chicago Public Art Program provides the paintings, murals, sculptures, and exhibits in the corridors of both airports. O'Hare International Airport displays a replica of the fighter plane flown by Lieutenant Commander Edward H. O'Hare, the airport's namesake. Likewise, Midway contains an exhibit of the SBD Dauntless, a dive bomber plane recovered from Lake Michigan. Both airports also have restaurants that feature Chicago delicacies created by local chefs, but only O'Hare has the world's first airport aeroponic garden where foods for the airport restaurants are grown. Passengers waiting at both airports can relax and stretch in the Yoga Room. They can also visit the world's first aeroponic garden in an airport where foods for the airport restaurants are grown. While both airports are kid-friendly, O'Hare provides a special interactive children's area. The "Kids on the Fly Exhibit" allows children to play in a model airplane, helicopter, and control center. With the additions of the aeroponic garden and the children's play area, O'Hare offers a unique airport experience

What is the overall structure of this text?

Define energy and power and describe the relationship that exists between them.

Explain how this relationship affects machines or other systems. (1 point)

Your answer should be in complete sentences that describe and explain both questions.
Be sure to check your grammar and spelling.

and them is the pic

Find the density of an object with a mass of 28.4 grams and a volume of 2.5 ml.

plss help me!!!!!!!!

Mid-ocean ridges are

A) Underwater mountains
B) Underwater flatlands
C) Underwater caves
D) All of the above

Which organelle’s function is NOT correct?

Mitochondria are the site of energy production in plant and animal cells.

The nucleus contains the genetic information for plant and animal cells.

Vacuoles store water in plant and animal cells.

The cell membrane is the only source of support and structure in plant and animal cells

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what questions you have about Earth’s motion and its relationship with the sun.

It was so cold overnight that you notice the next morning that some of your friends are skating on the lake behind your house. Describe what change of state took place in the lake and how energy played a role in the change.

Classification of Matter
Everything that has mass and volume is made of matter.
Atoms are the building blocks of matter. They cannot be broken down into smaller pieces using chemical reactions or physical changes. Various groups of atoms compose all known matter. Matter can be classified into two major categories: pure substances and mixtures.
Pure Substances
A pure substance is a type of matter that is made up of only one kind of material. All the particles (i.e., atoms or molecules) in a pure substance are the same, and the same properties are exhibited throughout the substance. There are two main types of pure substances: elements and compounds.
Elements—Elements are the simplest pure substance because they are made up of only one type of atom. For example, the element carbon is only made up of carbon atoms, and the element zinc is only made up of zinc atoms. The simplest unit of an element that still has the properties of that element is the atom. However, the atoms of some elements are naturally found bound to other atoms of the same element in two-atom units called diatomic molecules.
Today, there are over 100 known elements. These elements are represented by chemical symbols (e.g., C represents carbon and Zn represents zinc) and are listed in order of their atomic numbers on the periodic table.
The particle diagrams above model particles of elements. Single atoms of helium gas are shown on the left. Diatomic molecules of nitrogen are shown on the right.
Compounds—Compounds are pure substances that are made up of more than one type of element, chemically combined in a fixed ratio. Depending on the type of compound, its simplest unit may be a molecule or a repeating crystal pattern.
Although the properties of a compound differ from the properties of the elements that compose it, the molecules of a compound exhibit the same properties as one another. Also, since the elements within a compound are chemically combined, they can only be separated by chemical changes, such as the change caused by electrolysis.
Compounds have a definite chemical composition that can be identified using a chemical formula. Water (H2O), salt (sodium chloride, NaCl), and sugar (glucose, C6H12O6) are all examples of compounds.
The particle diagrams above show compounds. The diagram on the left models molecules of water. The diagram on the right models molecules of carbon dioxide.
Mixtures
Mixtures are made up of two or more substances that are not chemically combined. Because they are not chemically combined, the substances retain their own properties of matter, even though they are mixed together. Furthermore, mixtures can be separated by physical means, such as filtration or distillation.
The diagram on the left shows a mixture of diatomic molecules that contain only one type of atom. The diagram on the right shows a mixture of two different compounds whose molecules contain two different types of atoms.
Complete the chart below by writing 3 facts about each of the topics. Use the information from the passage you just read. You must write in complete sentences and can use examples.

Matter Pure Substances Mixtures Compounds Elements

By adding lubricant to the wheels of his car, Santiago determines that he can increase his car's average speed to 29.5 cm/s. What percentage increase does this represent?

which set of terms best defines what affects kinetic energy and potential energy
A. position, gravity
C. velocity, height
D. height, position

Ok I really really really need help!!

PLEASE HELP WILL GIVE BRAINLIEST

3. As you make your preliminary model, consider what questions you have about Earth’s motion and its relationship with the sun. Record two of your most pressing questions below.

help me ples i read it 5 times and i have now idea whut it means

Phenomenon: The sound of tapping on your desk is much louder and lower pitched when you listen to it with your ear pressed against the desk.

1. Use what you have learned to explain this phenomenon.

Natural vs. Synthetic
And I have to answers some questions which she didn't give no resources
Questions:
2) What is the importance to humans? (Why do humans use/make it?)

3) What natural resources are used to make the synthetic material?

4) What are the atomic structures of the reactants and the synthetic product?

5) How is the synthetic material made? (What chemical process(es) are used to create the product?)

6) What are the negative and positive impacts/effects of making and using the synthetic material, compared to making and/or using a more natural material with a similar function?

Which geologic action may produce a chain of volcanic islands?
a hot spot
a transform boundary
converging plates
a diverging plate boundary

What are 3 mediums that mechanical waves travel through.

Which of the following reactions are considered single replacement reactions? (2 points) pls help me


[Select ALL that apply]


2 Mg + O2 → 2MgO


CaO + H2O → Ca(OH)2


Fe + CuCl2 → FeCl2 + Cu


Au2S3 + 3 H2 → 2 Au + 3 H2S


NaNO3 + KC2H3O2 → NaC2H3O2 + KNO3


2 MgNH4PO4 → Mg2P2O7 + 2 NH3 + H2O

The cells that form the lining of the stomach most likely form ______ since they produce secretions and protect the stomach.