scienze

a student makes a chart about galaxies and mentions that the universe consists of many galaxies such as the andromeda galaxy and the milky way galaxy. what is a true statement about these two galaxies? The milky way is a spiral galaxy, the Andromeda is no...

1 year ago

what happens to the impact of gravity between earth and moon if the moon grows two sizes?

1 year ago

A scientist heats 30 grams of calcium carbonate (CaCO3) in the chemical reaction shown. CaCo3 -> CO2 -> CaO. What is the total mass of the products?

1 year ago

4Fe -> 3O2 -> 2Fe2 -> O3 What happens to the atoms of Fe and O2 during the reaction?

1 year ago

Which is most likely to occur during a chemical reaction? Mass is conserved. New atoms are created. The original substance maintains its properties. Or Atoms of the original substance are lost.

1 year ago

NaHCO3 -> NC2H3O2 -> NaC2H3O2 -> H2O -> CO2 A student mixes baking soda (NaHCO3) and acetic acid (HC2H3O2) to produce a chemical reaction shown. Which statement about the reaction is correct? The atoms of the reactants are regrouped during the reaction. T...

1 year ago

2H2 + O2 +2H2O There are four atoms of Hydrogen (H) before the reaction. How many atoms of hydrogen are present after? 5 4 8 2

1 year ago

What do elements in the same column (group) on the periodic table have in common? * They have the same number of protons. They have similar chemical properties. They have the same atomic mass. They have the same physical state at room temperature.

1 year ago

use the table of temperatures from several areas to complete the statement. Area X = 22C Y=18C Z=18C Air will move from a) area z to y b) area x to x c) area t to z d) area y to x

1 year ago

Use the table of temperatures measured in two areas of a house to answer the question. Area: Downstairs- Temperature: 22C Area: Upstairs - Temperature 26C Which statement best explains the temperature difference? A) The cooler air downstairs loses energy...

1 year ago

Which option is an example of heat transfer by conduction? A) Air getting warm from a radiator B) Pavement heating up in the sun C) Air conditioner cooling the room D) person getting warm from an electric blanket

1 year ago

Samantha is conducting an experiment to investigate how the amount of sunlight affects the growth of plants. She decides to measure the height of the plants every week for a month. What is the independent variable in Samantha's experiment?

1 year ago

Sarah is learning about heat transfer in science class. She observes a pot of water boiling on a stove. Which heat transfer method is primarily responsible for the water in the pot getting heated through direct contact with the hot stove?

1 year ago

Michael is probably going to become an engineer. He spends most of his free time building gadgets. Which of those sentences is a premise?

1 year ago

which car has the greatest efficiency? a 1,200 kg car that travels 15 km per liter of fuel? a 900 kg car that travels 20 km per liter? a 900 kg car that travels 15 km per liter? a 1200 kg car that travels 20 km per liter?

1 year ago

True or False? Wolves made the water quality of rivers, streams, and lakes better in Yellowstone.

1 year ago

What happened to the Aspen Trees when the wolves returned to Yellowstone?

1 year ago

Humans and bacteria are similar in that they A) are multicellular B) are unicellular C) grow and reproduce D) produce energy i think its C

1 year ago

Select the most specific taxonomic group that includes all animals that have backbones. A) the phylum Chordata B) the class Aves C) the kingdom Animalia or D) the family Strigidae

1 year ago

They maintain their properties. They gain mass. They are rearranged. Or They are lost.

1 year ago

so the answer is 30?

1 year ago

that is incorrect. the answer choices are 10 15 30 or 20

1 year ago

Which statement best represents the Law of Conservation of Mass? * 2 points Matter can disappear in a chemical reaction. The total mass of substances stays the same a chemical reaction. The mass of a substance increases during a physical change. Mass cons...

1 year ago

Which one shows a chemical change? * 2 points Rust on a lock. Chopping wood for a fire Mixing cake batter and water. Boiling water

1 year ago

Atoms are tiny particles of matter that are made up of three particles. Which particles are located in the nucleus? * 2 points electrons, protons & neutrons protons & neutrons elements & neutrons neutrons

1 year ago

sorry b is supposed to say x to Z

1 year ago

Studying is an essential part of learning the subject matter. Students who don’t study are thus, to a certain degree, depriving themselves of the learning process. which of these sentences is a conclusion?

1 year ago

A) diagram B) model C) table or D) graph

1 year ago

A) Lilacs are vascular plants. B) Pine trees have leaves. C) Lilacs have flowers or D) pine trees produce seeds

1 year ago

no, the answer was B

1 year ago