Universal 8th grade science review

Question 1

A ____ is a possible explanation for a set of observations or answer to a scientific question.

Accepted Answer

Hypothesis

Question 2

Is the ability of a substance to burn a physical or chemical property?

Accepted Answer

Chemical

Question 3

Metals are located on the _____ of the periodic table

Accepted Answer

left

Question 4

Which of the following increase the rates of reactions?

Accepted Answer

increasing the surface area, adding heat

Question 5

Where are neutrons located in an atom?

Accepted Answer

The nucleus

Question 6

dependent variables are found on the __ axis.

Accepted Answer

y

Question 7

Which group(s) are transitional metals a part of?

Accepted Answer

3-12

Question 8

What is the symbol for Berrylium?

Accepted Answer

Be

Question 9

______ developed the planetary model of the atom

Accepted Answer

Bohr

Question 10

Using one or more senses to gather information is called

Accepted Answer

Observing

Question 11

True or false: synthesis and decomposition are opposite processes

Accepted Answer

true

Question 12

When atoms combine, the force of attraction that holds them together is called a(n)

Accepted Answer

Chemical Bond

Question 13

there are ___ periods on the periodic table

Accepted Answer

7

Question 14

Is the ability of a substance to tarnish a physical or chemical property?

Accepted Answer

Chemical

Question 15

Who coined it the name "atomos"

Accepted Answer

Democratus

Question 16

How is sulfate written?

Accepted Answer

SO4-2

Question 17

Which one is true?

Accepted Answer

Shape and texture are physical properties.

Question 18

Which of these are homogeneous?

Accepted Answer

Lemon juice without pulp

Question 19

Facts, figures, and other evidence gathered through observations are called

Accepted Answer

data

Question 20

Groups are ________ on the periodic table

Accepted Answer

vertical columns ^

Question 21

A(n) ______ is an atom or a group of atoms that carry a charge.

Accepted Answer

ion

Question 22

True or false: Cations are positively charged

Accepted Answer

True

Question 23

True or false: Neon is a halogen

Accepted Answer

false

Question 24

True or false: alkali metals are located in the second group on the periodic table

Accepted Answer

false

Question 25

A covalent bond is called _________ if the atoms equally share one or more pairs of electrons

Accepted Answer

Nonpolar

Question 26

Which one of these is a pure substance?

Accepted Answer

Table salt

Question 27

How is density calculated?

Accepted Answer

d=m/v

Question 28

Is the ability of a substance to boil a physical or chemical property?

Accepted Answer

Physical

Question 29

Which of these mixtures is heterogeneous?

Accepted Answer

Damp soil

Question 30

The study of the properties of matter and how matter changes is called

Accepted Answer

Chemistry

Universal 8th grade science review

Questions 30

Universal 8th grade science review

Questions 30