Grade 7 Chemistry

1. MATTER
•Is anything that
occupies space
and has mass.

2. Is light
matter?
No, because light does
not occupy space and
has no mass.

3. Is chair
matter?
Yes, because a chair can
occupy space and has
mass.

4. STATES/
PHASES
OF
MATTER

5. EXAMPLES OF PURE SUBSTANCES
ELEMENTS COMPOUNDS
Sodium (Na) Water (H2O)
Chlorine (Cl) Salt (NaCl)
Oxygen (O) Hydrochloric acid (HCl)
(muriatic acid)
Hydrogen (H) Sugar (C12H22O11)
Gold (Au) Alcohol
Copper (Cu) Acetic Acid (CH3COOH)
Nitrogen (N) Carbon dioxide (CO2)

6. CLASSIFICATION
OF MATTER
•Mixtures
•Pure Substances

7. PURE SUBSTANCES vs MIXTURES
PURE
SUBSTANCE
MIXTURE
Always
homogeneous
Made up of only 1
kind of matter
Homogeneous or
heterogeneous
Made up of two or
more substances
Atoms are
chemically
combined
Atoms are physically
combined

8. PURE SUBSTANCES vs MIXTURES
PURE
SUBSTANCE
MIXTURE
Always homogeneous
Made up of only 1 kind
of matter
Definite melting and
boiling point
Homogeneous or
heterogeneous
Made up of two or more
substances
No fix melting and
boiling point
Melts completely and
smoothly
Do not melt completely
Atoms are chemically
combined
Atoms are physically
combined

11. DIFFERENCES

13. PURE
SUBSTANCES:
Elements and
Compounds
Photo

17. Contents:
Learning
Assessment
Activities
•Picture Identification
•Elements vs Compounds

18. PICTURE
IDENTIFICATION
Identify whether the substance
shown in the picture is an element
or a compound.

19. ELEMENT? COMPOUND?
OR
Answer:
ELEMENT
Diamond is a form of
pure carbon

20. ELEMENT? COMPOUND?
OR
Answer:
COMPOUND
Water is composed of
the elements Hydrogen
and Oxygen

21. ELEMENT? COMPOUND?
OR
Answer:
COMPOUND
Sugar is composed of
the elements Carbon,
Hydrogen, Oxygen

22. ELEMENT? COMPOUND?
OR
Answer:
ELEMENT
Fe is the chemical
symbol of the element
iron

23. ELEMENT? COMPOUND?
OR
Answer:
COMPOUND
Muriatic acid is
comprised of the
elements Hydrogen and
Chlorine
HCl

24. ELEMENT? COMPOUND?
OR
Answer:
COMPOUND
N is nitrogen and H is
Hydrogen

25. ELEMENT? COMPOUND?
OR
Answer:
ELEMENT
The chemical symbol of
gold is Au

26. ELEMENT? COMPOUND?
OR
Answer:
ELEMENT
This is a copper wire.
Copper is a metallic
element with a chemical
symbol Cu

27. ELEMENT? COMPOUND?
OR
Answer:
COMPOUND
This is the chemical
formula for table salt.
Na is sodium and Cl is
chlorine.

28. ELEMENT? COMPOUND?
OR
Answer:
COMPOUND
Sulfuric acid is made up
of the elements
Hydrogen (H), Sulfur (S),
and Oxygen (O).
H2SO4

29. ELEMENTS VS
COMPOUND
Write E if the statement refers to
Element. Write C if the statement
refers to Compound.

30. 11. Made up of a single type of atom.
13. Cannot be broken down by physical or
chemical means.
12. Two or more elements chemically combined to
form a new substance.

31. 14. Can be separated into simpler substance by chemical
means.
15. Simplest form of pure substance.

32. 16. Its smallest particle is called atom.
17. It is formed when two or more atoms
chemically combined.

33. 18. It is represented by chemical formula
19. It is represented by chemical symbols.

34. What is matter?
Is anything that occupies space and
has mass.

35. https://www.baamboozle.com/quiz/771203?&theme=28
https://education.jlab.org/elementflashcards/

36. ELEMENT? COMPOUND?
OR
Answer:
ELEMENT
Diamond is a form of
pure carbon