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G7 Science- Review Mid 1
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What are the products of aerobic respiration? a. Glucose, water, and oxygen b. Water, oxygen, and glucose c. Carbon dioxide, water, and Energy d. Carbon dioxide, glucose, and water
c
A _________ is made when two or more substances are contained, but not chemically bonded. a. compound b. molecule c. element d. mixture
d
What are the reactants of Photosynthesis? a. Water and oxygen b. Glucose and carbon dioxide c. Water and Carbon dioxide d. Water and glucose
c
Group number (column) is associated with ____________. a. Valence electrons b. Atomic mass c. Electron shells d. Atomic number
a
A _________ is a substance formed when two or more different atoms are chemically bonded together. a. element b. mixture c. compound d. molecule
c
Observing physical properties of a substance _______ involve changing the structure of the atom(s). a. don't b. do c. could d. should
a
Which one is of the following is not a step in the scientific method? a. Data b. Definition c. Experiment d. Observation
b
Aerobic respiration requires _________. a. Water b. Sunlight c. Oxygen d. Carbon dioxide
c
Period number (row) is associated with ____________. a. Atomic number b. Electron shells c. Valence electrons d. Atomic mass
b
What does the chemical symbol 'K' represent?
d
The one variable that is changed is called the _________.
a
What are the reactants of aerobic respiration?
c
Sodium has 3 electron shells and 1 valence electron. It belongs in ___________.
d
Respiration Equations?
(Read in the pic)
What is Cellular Respiration ?
Cellular respiration is when cells use food (ex: glucose) to make energy.
Name Organs or body parts of respiratory system?
: Nasal passage, pharynx, larynx, trachea, bronchi, bronchioles, lungs, and alveoli
What is Atomic mass?
The atomic mass number is how many protons and neutrons are in the nucleus
What is Atomic number?
• The atomic number tells us how many protons are in the nucleus of the atoms. The number of electrons is equal to the number of protons
Atomic structure?
Atoms consist of three basic particles: protons, electrons, and neutrons.
In the periodic table, which wow call " group"? How many group the table?
The vertical columns are called “groups”. There are 18 groups in the periodic table
In the periodic table, which wow call " period"? How many periods the table?
The horizontal rows are called periods, there are 7 periods in the periodic table.
Physical properties of non-metals?
Dull (not shiny) • Insulators(poor conductor of electricity) • Substances with low melting point • Brittle when solid(breaks easily) Non-ductile • Transparent
Physical properties of metals?
Lustrous (shiny) • Good conductor of electricity • Solids with a high melting point • Malleable (can be shaped) Ductile (can be stretched into wires) • Opaque
What is a mixture?
A mixture is made when two or more substances are combined, but not chemically bonded
What is a compound?
A compound is a substance formed when two or more chemical elements are chemically bonded together.
What is an element?
An element is any substance made of only one type of atom.
What is control variables?
The variable(s) in an experiment that is always the same
What is dependent variables?
A factor that may change as a result of changes made to the independent variable
What is independent variables?
Independent variable: A factor that is changed by the experimenter on purpose
What is a fair test?
A fair test is an experiment where only one variable is changed, and all other variables are kept the same.
Step-by-step process of The Scientific Method
Observation => Hypothesis=> Prediction => Experiment => Data
Can you guess what the symbols mean?
TOXIC: Can cause death when swallowed,breathed in or absorbed through the skin
Can you guess what the symbolsmean?
CORROSIVE: Substances that attack and destroy living tissues, including the eyes and skin
Can you guess what the symbolsmean?
Highly flammable
What PPE can you see in the picture ?
• Safety goggles • Mask • Ear plugs / hearing protection • Safety gloves • Closed-toed shoes • Hair net / helmet • Lab coat
Elements in period 7 have ____ electron shells.
7
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