Chemistry of Life Exit Ticket

The basic unit of matter

• matter

• energy

• atom

• isotope

Answer explanation

The basic unit of matter is the atom, which consists of protons, neutrons, and electrons. Matter is made up of atoms, while energy and isotopes are related concepts but not the fundamental unit of matter.

Tags

NGSS.MS-PS1-1

The center of the atom which contains the protons and neutrons

• electrons

• core

• center

• nucleus

Answer explanation

The nucleus is the center of the atom, containing protons and neutrons. Electrons orbit around the nucleus, while the core and center are not specific terms used to describe this part of the atom.

Negatively charged particle; located outside the atomic nucleus

• electrons

• neutrons

• protons

• atom

Answer explanation

Electrons are negatively charged particles that orbit the atomic nucleus, distinguishing them from protons (positively charged) and neutrons (neutral), which are located within the nucleus.

A substance consisting entirely of one type of atom

• compound

• atom

• molecule

• element

Answer explanation

An element is a pure substance made up of only one type of atom, distinguishing it from compounds (which consist of different atoms) and molecules (which are combinations of atoms). Therefore, the correct answer is 'element'.

Atom of an element that has a number of neutrons different from that of other atoms of the same element

• neutron

• neutral

• element

• isotope

Answer explanation

An isotope is an atom of an element that has a different number of neutrons compared to other atoms of the same element, resulting in different atomic masses. Thus, the correct answer is 'isotope'.

What is the definition of matter?

• A measure of how difficult it is to stretch or break the surface of a liquid

• The smallest part of an element that still has the properties of that element

• The most basic unit of life

• Anything that has mass and occupies space

Answer explanation

The correct definition of matter is 'anything that has mass and occupies space.' This encompasses all physical substances, distinguishing it from other concepts like surface tension or biological units.

Tags

NGSS.MS-PS1-5

What is the purpose  of an enzyme?

• give permission for the reaction

• raise activation energy

• speed up reactions

• control how many reactions occur

Answer explanation

The primary purpose of an enzyme is to speed up reactions by lowering the activation energy required for the reaction to occur, making processes more efficient.

Tags

NGSS.MS-LS1-7

_{What particle is found in the nucleus and has no charge?}

• electron

• neutron

• proton

• atom

Answer explanation

The neutron is a subatomic particle located in the nucleus of an atom and is electrically neutral, meaning it has no charge. In contrast, protons are positively charged, and electrons are negatively charged.

Tags

NGSS.MS-PS1-1

All of the known elements are arranged in a ________________ according to their specific properties.

• periodic table

• random pattern

• rectangle

• list

Answer explanation

The correct answer is 'periodic table' because it is a systematic arrangement of all known elements based on their properties, such as atomic number and chemical behavior, unlike the other options which do not represent such organization.

Label the following item

a

b

c

Electron

Proton

Neutron

Tags

NGSS.MS-PS1-1