Science

Question 1

What are 4 properties of organizing elements

Answer 1

Name, symbol, atomic number, and there metallic or non metallic character

Question 2

Atom

Answer 2

Smallest particle of a element

Question 3

Molecule

Answer 3

The smallest particle of a substance that can be found in nature

Question 4

Element

Answer 4

A substance made up of one atom

Question 5

4 examples of elements

Answer 5

Helium,hydrogen,iron, and copper

Question 6

Compound

Answer 6

Something that consists of 2 or more atoms

Question 7

Examples of molecules

Answer 7

Carbon dioxide,water,oxygen,and sugar

Question 8

Examples of compounds

Answer 8

Carbon dioxide,water, salt, and vinegar

Question 9

All substances are made up of

Answer 9

Atoms

Question 10

FBr3

Answer 10

Molecule and compound

Question 11

Si4

Answer 11

Atom and element

Question 12

Reactant

Answer 12

A substance that takes part in and undergoes change during reaction

Question 13

Product

Answer 13

The substance that result in recombination of atoms

Question 14

What does a periodic tabled do?

Answer 14

It arranges the atomic number of elements with a similar atomic structure

Question 15

What does the arrow in a chemical reaction mean?

Answer 15

It means to yield or produce

Question 16

Rules to identify a chemical reaction equation

Answer 16

1. describes chemical reaction
2. pure substances change to other pure substances
3. The reactants and products are different

Question 17

Examples of organisms that use photosynthesis

Answer 17

Plants, algae, some bacteria and protists

Question 18

Goal production of photosynthesis is

Answer 18

Carbon dioxide+water -> carbohydrate+ oxygen

Question 19

What are the products of photosynthesis?

Answer 19

Oxygen and glucose

Question 20

What can happen to the goal product of photosynthesis?

Answer 20

1. used immediately
2. to store
3. provide food for other organisms

Question 21

What is engineering?

Answer 21

A designed process that involves critical thinking. Constantly evaluating and revisiting ideas.

Question 22

The engineer design process

Answer 22

Problem, constraints, prototype, final approval