Asked by x

How are fossil fuels formed?(1 point)
Responses

from decaying matter not recycled into the atmosphere
from decaying matter not recycled into the atmosphere

by heat energy intensifying over the ocean
by heat energy intensifying over the ocean

from water released by plants
from water released by plants

by photosynthesis
Answered by x
What is a pure substance made of positive and negative ions in a fixed ratio called?(1 point)
Responses

a hydrogen bond
a hydrogen bond

an ionic compound
an ionic compound

a polar molecule
a polar molecule

an atom
Answered by x
How does hydrogen bonding explain the properties of water when it freezes.(1 point)
Responses

It allows the water to evaporate as it freezes.
It allows the water to evaporate as it freezes.

It makes ice float on top of water instead of sink.
It makes ice float on top of water instead of sink.

It causes ice to become more dense than water.
It causes ice to become more dense than water.

It creates tight spaces between water molecules.
Answered by x
An organism is sealed in a chamber. Scientists measure the amount of carbon dioxide and oxygen in the chamber. In 3–5 sentences, explain how they can use the volumes of these gases to determine if photosynthesis or cellular respiration is occurring in in the chamber.
Answered by x
Identify which building blocks sugars, amino acids, and fatty acids are broken into. Then, explain how the nutrients contribute to your body's biochemistry 1 sentence
Answered by x
An ice pack is cracked, starting a reaction. The ice pack decreases in temperature as the reaction absorbs heat energy from the environment. The temperature of the surroundings decreases as heat is absorbed by the ice pack. Is this process exothermic or endothermic? Explain your reasoning in 3-5 sentences.
Answered by GPT-4o mini
Fossil fuels are formed **from decaying matter not recycled into the atmosphere**. This process typically involves the decomposition of ancient organic materials—such as plants and marine organisms—over millions of years, under conditions of heat and pressure.
Answered by GPT-4o mini
A pure substance made of positive and negative ions in a fixed ratio is called **an ionic compound**.
Answered by GPT-4o mini
Hydrogen bonding explains the properties of water when it freezes because **it makes ice float on top of water instead of sink**. When water freezes, the hydrogen bonds arrange the water molecules into a structure that is less dense than liquid water, causing ice to float.
Answered by GPT-4o mini
Scientists can determine whether photosynthesis or cellular respiration is occurring in the chamber by measuring the changes in the volumes of oxygen and carbon dioxide. During photosynthesis, plants consume carbon dioxide and produce oxygen, leading to a decrease in carbon dioxide levels and an increase in oxygen levels. Conversely, during cellular respiration, organisms consume oxygen and produce carbon dioxide, resulting in an increase in carbon dioxide levels and a decrease in oxygen levels. By analyzing the relative changes in these gas volumes over time, scientists can infer which process is dominant in the chamber.
Answered by GPT-4o mini
Sugars are broken down into monosaccharides (like glucose), amino acids are the building blocks of proteins, and fatty acids are constituents of lipids; together, these nutrients contribute to the body's biochemistry by serving as essential energy sources, components of cellular structures, and substrates for metabolic reactions necessary for growth, repair, and maintenance of bodily functions.
Answered by GPT-4o mini
The process described is **endothermic** because the reaction within the ice pack absorbs heat energy from the surrounding environment, leading to a decrease in temperature both within the ice pack and in the surrounding area. In an endothermic reaction, the system gains energy, resulting in the cooling of the surroundings, which is evident as the ice pack decreases in temperature. This absorption of heat indicates that the chemical reaction within the ice pack requires energy input to proceed, further confirming its endothermic nature. In contrast, an exothermic reaction would release heat, causing an increase in the temperature of the surroundings.