Key words

Word 1

MOLECULE

• To keep something in good condition or stop it from breaking down.
• A very small particle made of atoms; it forms chemicals like water or heme.
• A group of similar cells in a body, like muscle or skin.
• A device that makes very small things look bigger so we can see them.

Word 2

DEBATE

• A discussion where people give different opinions about a question.
• A gas in the air that people and animals need to breathe.
• To keep something in good condition or stop it from breaking down.
• The remains or mark of an ancient plant or animal preserved in rock.

Word 3

PRESERVE

• A device that makes very small things look bigger so we can see them.
• A group of similar cells in a body, like muscle or skin.
• A very small particle made of atoms; it forms chemicals like water or heme.
• To keep something in good condition or stop it from breaking down.

Word 4

TISSUE

• A group of similar cells in a body, like muscle or skin.
• A gas in the air that people and animals need to breathe.
• Causing disagreement because people have different strong opinions.
• A device that makes very small things look bigger so we can see them.

Word 5

FOSSIL

• A device that makes very small things look bigger so we can see them.
• The remains or mark of an ancient plant or animal preserved in rock.
• A gas in the air that people and animals need to breathe.
• A very small particle made of atoms; it forms chemicals like water or heme.

Word 6

MICROSCOPE

• A gas in the air that people and animals need to breathe.
• A device that makes very small things look bigger so we can see them.
• Causing disagreement because people have different strong opinions.
• To keep something in good condition or stop it from breaking down.

Word 7

CONTROVERSIAL

• A discussion where people give different opinions about a question.
• Causing disagreement because people have different strong opinions.
• A gas in the air that people and animals need to breathe.
• A very small particle made of atoms; it forms chemicals like water or heme.

Word 8

OXYGEN

• Causing disagreement because people have different strong opinions.
• A gas in the air that people and animals need to breathe.
• The remains or mark of an ancient plant or animal preserved in rock.
• A very small particle made of atoms; it forms chemicals like water or heme.