CHEMISTRY MIDDLE SCHOOL

1.What are pollen grain? 2. what is an embryo?

Answers

Answer 1

Answer:

Answer: 2= baby being developed= embryo 1 i dont know sorry

Explanation:

Answer 2

Answer:

Pollen grains is the Male reproductive organ.

An embryo is a zygote.

Explanation:

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Four gases are described below:Gas A: 5 liters at 20 °CGas B: 5 liters at 10 °CGas C: 5 liters at 40 °CGas D: 5 liters at 30 °CWhich gas has the greatest average molecular kinetic energy?
The doldrums region on Earth is created by an amount of heating from the Sun that results in the rising of warm, moist air, low air pressure, cloudiness, high humidity, and numerous forms of severe weather, such as thunderstorms. Hurricanes originate in this region. The doldrums are also noted for calms, periods when the winds disappear, trapping sailing vessels for days or weeks. Where are the doldrums found?
How does ur body maintain constant tempature on a hot day?

Why do you need a reference point to know if an object is moving

Answers

to measure the distance and velocity

What is a magnetic reversal

Answers

A change in the Earth's magnetic field resulting in the magnetic north being aligned with the geographic south, and the magnetic south being aligned with the geographic north. Also called geomagnetic reversal.

baseball fields have dirt in the infield and grass in the outfield. the is more likely to erode because

Answers

grass is more likely to erode.

Are most elements on the periodic table nonmetals?

Answers

wouldn’t say most but yes

Final answer:

No, most elements on the periodic table are not nonmetals. About 75% of the elements on the periodic table are metals, with nonmetals including the Noble Gases, Halogens, Nitrogen and Oxygen making up a smaller portion. Additionally, the Metalliods, which are elements with properties of both metals and nonmetals, also hold a place on the periodic table.

Explanation:

No, most elements on the periodic table are not nonmetals, but rather metals. The periodic table is primarily comprised of metals, with the so-called 'metal' elements making up about 75% of the table's total elements. Nonmetals count for only a small part, located on the right side of the table. They include the Noble Gases, the Halogens, and some others like Nitrogen and Oxygen

Furthermore, there are a group of elements known as the Metalliods or Semi-Metals which have properties in between metals and nonmetals. These are located in a diagonal line from Boron to Astatine.

Learn more about Periodic Table here:

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Which condensed structural formula represents an unsaturated compound?(1) CH3CHCHCH3 (3) CH3CH3
(2) CH3CH2CH3 (4) CH4

Answers

(1) CH3CHCHCH3.................

(1) CH3CHCHCH3 because it contains a double bond.

Which compound is classified as a hydrocarbon?(1) butanal (3) 2-butanol
(2) butyne (4) 2-butanone

Answers

Answer: The correct answer is Option 2.

Explanation:

Hydrocarbons are defined as the compounds which have a covalent bond present between hydrogen and carbon atoms. For Example: $CH_4$ is a hydrocarbon. $H_2O,CO_2$ are not considered as hydrocarbons.