CHEMISTRY MIDDLE SCHOOL

Some one please help me on this.

Answers

Answer 1

Answer:

The mould and cast fossil is Option B.

The carbon film fossil is Option C.

The Amber fossil is Option A.

The ice fossil is Option D.

Explanation:

Mould and cast fossils are formed when an organism or any organic object gets buried inside sediment and gets decomposed off, leaving an empty space between the sediments which are occupied by different minerals like carbon, calcium, silica etc. Thus, this mineral takes the shape of that decomposed object and stays for years.

The carbon film fossils are those fossils which take long time to form and are difficult to recover as well. They are formed when some organic substance gets very deep into Earth's surface and gets burned by the interior lava into only a thin layer of carbon.

The amber fossils are very common which are formed when the living organisms get stuck in plant resins and dies, which are enclosed into the plant's resin and are recovered thousands of years after.

The ice fossils aren't actually fossil because in very cold regions, the dead bodies often don't decompose but remain as it is for years. Thus the soft tissues are also recoverable after many years.

Related Questions

How do you do problem #15?
The electric pencil sharpener in Mrs. Brown's classroom gets very warm on days when many students need to sharpen their pencils.Choose the form of energy to fill in the blank in the energy conversion diagram below.Electrical Energy ____________________ Heat EnergyLight EnergyMechanical EnergyNuclear EnergyChemical Energy
Some land plants have evolved specialized vascular tissues that have allowed them to thrive on land. The developement of these structures was necessary becauseLand plants need to extract water from the ground and move it to the other structures of the plant. Land plants need to be tall and the vascular tissues are what provide rigidity to the plant’s cells. Land plants need to photosynthesize and the vascular tissues is where this process occurs. Land plants don’t really need these structures as they can absorb water from the air through their leaves.
Which statement describes the chemical property of oxygen
100% short length100% medium length100% long length50% long , 50% short

What chemicals are produced during the use of e-cigarettes

Answers

Answer:

tar and nicotine which are produced when the tobacco leaves are burning.

________ use organelles called _________ in their leaves to collect _____ energy

Answers

My guess would be: Plants use organelles called chloroplasts in their leaves to collect light/solar energy.

the last one is the suns energy

Which statement about reversible reactions is correct? At equilibrium, the forward and reverse reactions stop at the appropriate concentrations. At equilibrium, the forward and reverse reactions continue indefinitely. At equilibrium the rate of reaction of products divided by the rate of reaction of reactants equal the equilibrium constant, K.

Answers

The correct answer is At equilibrium the rate of reaction of products divided by the rate of reaction of reactants equal the equilibrium constant, K.

The chemical reactions which occurs in forward direction as well as backward direction under particular conditions is said to be reversible reactions. In these reactions, concentration of reactants and products remain same and both reactions i.e. forward and backward reactions occurs at similar rates.

Equilibrium is the state of reaction in which formation of reactants into products and formation of products into reactants occurs simultaneously at similar rate.

Now, equilibrium constant is equal to the ratio of concentration of the products to the concentration of the reactants.

For example: $A+B\rightarrow C+D$

$k = ([C][D])/([A][B])$

Since, rate of reaction is directly proportional to the equilibrium constant i.e.

$k_(eq)= (rate of reaction of product)/(rate of reaction of reactant)$

= $((d[C][D])/(dt))/((d[A][B])/(dt))$

Thus, equilibrium constant is equal to the ratio of rate of reaction of product to the rate of reaction of reactant at equilibrium.

Answer:

At equilibrium, the forward and reverse reactions continue indefinitely.

Explanation:

Took the lesson, got the answers back.

Which mineral has the chemical formula Fe2O3?

Answers

Answer:

FE is iron so its two irons and O is oxygen and its 3 oxygen

is that what you want?

Explanation:

Explain how transverse waves can be produced on a rope. Then describe how pieces of the rope move as waves pass.

Answers

Transverse waves can be produced on a rope by moving one end of the rope up and down.The movement causes motion in the particles that make up the rope and the rope itself becomes the medium. The particles move perpendicular to the propagation. The movement also causes crests(highest point of the wave) and troughs (lowest point of the wave) which move along the direction of propagation.

What determines how many bond an atom will form?

Answers

The electronegativities of the two atoms play a part in determining what kind of bonds are formed. The main two types of chemical bonds are ionic and covalent. Covalent bonds are formed by atoms that share valence electrons and are most commonly formed between nonmetal atoms.

Their valance electrons are redistributed in ways that make the atoms more stable.

Other Questions

These models show the electron structures of two different nonmetal elements.Which element is likely more reactive, and why?A.) Element 1 is more reactive because it has fewer electron shells and is toward the top of its group on the periodic table.B.) Element 1 is more reactive because it has more electrons in its valence shell and is farther to the right on the periodic table.C.) Element 2 is more reactive because it does not have a valence shell close to the nucleus, so it will attract electrons.D.) Element 2 is more reactive because it does not have a full valence shell, so it will attract electrons.

what is a measure of the amount of matter in an object while what is a measure of the force of gravity acting on an object

Euglena,amoeba, and paramecium are in what kingdom

What is the [H+] of a solution with a pH of 5.6