H.M.H. - 4-1Describing matter and energy in Organisms part 1

What is matter?

• Anything that has mass and takes up space

• Only living things

• Only nonliving things

• Anything that is visible

Answer explanation

Matter is defined as anything that has mass and occupies space. This includes both living and nonliving things, making the first choice the correct answer.

Tags

NGSS.MS-PS1-5

Which of the following is an example of a compound?

• Oxygen

• Hydrogen

• Water

• Carbon

Answer explanation

Water is a compound made up of two hydrogen atoms and one oxygen atom (H2O). In contrast, oxygen and hydrogen are elements, and carbon is also an element, not a compound.

Tags

NGSS.MS-PS1-1

What are the building blocks of matter?

• Cells

• Molecules

• Atoms

• Compounds

Answer explanation

The building blocks of matter are atoms, which are the smallest units of elements. Molecules and compounds are made up of atoms, while cells are the basic units of life, not matter itself.

Tags

NGSS.MS-PS1-5

What happened to the dinosaurs and plesiosaurs 66 million years ago?

• They evolved into birds

• They migrated to another planet

• They went extinct due to a mass extinction event

• They became the dominant species on Earth

Answer explanation

66 million years ago, a mass extinction event, likely caused by an asteroid impact, led to the extinction of dinosaurs and plesiosaurs, making 'They went extinct due to a mass extinction event' the correct choice.

Tags

NGSS.MS-LS4-1

Which of the following is NOT made of matter?

• Air

• Light

• Water

• Rock

Answer explanation

Light is not made of matter; it is a form of energy. In contrast, air, water, and rock are all composed of particles and have mass, making them forms of matter.

What is the smallest unit of a substance that maintains the properties of that substance?

• Cell

• Molecule

• Atom

• Element

Answer explanation

The smallest unit of a substance that retains its properties is an atom. Atoms combine to form molecules, but they are the fundamental building blocks of matter, making them the correct answer.

Tags

NGSS.MS-PS1-5

How many elements occur naturally on Earth?

• About 50

• Nearly 100

• Over 200

• Exactly 150

Answer explanation

Nearly 100 elements occur naturally on Earth, including essential ones like oxygen, carbon, and iron. This number reflects the elements found in nature, while others are synthetic and not naturally occurring.

Tags

NGSS.MS-PS1-1

Which of the following is an element?

• Water

• Carbon dioxide

• Oxygen

• Salt

Answer explanation

Oxygen is an element, represented by the symbol O on the periodic table. In contrast, water (H2O), carbon dioxide (CO2), and salt (NaCl) are compounds made of multiple elements.

Why do living things need matter?

• To provide energy for movement

• To provide materials needed to grow and carry out life processes

• To make them visible

• To keep them warm

Answer explanation

Living things need matter primarily to provide materials necessary for growth and to carry out essential life processes, such as metabolism and reproduction, making this choice the most accurate.

Tags

NGSS.MS-LS1-7

What is a substance made of atoms of two or more different elements called?

• Element

• Compound

• Mixture

• Solution

Answer explanation

A substance made of atoms of two or more different elements is called a compound. Compounds are formed when elements chemically bond together, unlike mixtures, which are physical combinations of substances.