Grade 7 Science: Levels of Biological Organization

Levels of Biological Organization

1. Individual: One of the species; e.g., one chipmunk, one human, one maple tree

2. Population: A group of individuals of the same species; e.g., a group of mallard ducks. Species refers to the most closely relating living things in an ecosystem - they can reproduce among each other.

3. Community: populations of different species that live and interact in a habitat

4. Ecosystem: The interactions of the populations with each other and the local abiotic elements makes up the ecosystem

Grade 8 Chapter 1 Test

Your Test is on Wednesday October 2nd Period 2

Photosynthesis Videos

Please complete both worksheets for homework.

Here is the link to the first introduction to photosynthesis video we viewed in class:

http://www.teachersdomain.org/asset/tdc02_vid_photosynth/

Here is a playlist of 3 videos:

1. The chemical reaction of photosynthesis
2. The photosynthesis music video
3. An in depth enrichment video about photosynthesis for students interested in further study

Grade 8 Math Divisibility Rules

Divisibility by:

2	If the last digit is even, the number is divisible by 2.
3	If the sum of the digits is divisible by 3, the number is also.
4	If the last two digits form a number divisible by 4, the number is also.
5	If the last digit is a 5 or a 0, the number is divisible by 5.
6	If the number is divisible by both 3 and 2, it is also divisible by 6.
7	Take the last digit, double it, and subtract it from the rest of the number; if the answer is divisible by 7 (including 0), then the number is also.
8	If the last three digits form a number divisible by 8, then so is the whole number.
9	If the sum of the digits is divisible by 9, the number is also.
10	If the number ends in 0, it is divisible by 10.
11	Alternately add and subtract the digits from left to right. (You can think of the first digit as being 'added' to zero.) If the result (including 0) is divisible by 11, the number is also. Example: to see whether 365167484 is divisible by 11, start by subtracting: [0+]3-6+5-1+6-7+4-8+4 = 0; therefore 365167484 is divisible by 11.
12	If the number is divisible by both 3 and 4, it is also divisible by 12.

Grade 7 Equipment Activity Answers

Name	How it is used	Safety Procedures
Beaker	-mixing liquids -containing liquids -Heating substances -Measuring liquids	Use tongs or gloves if it is hot; careful not to spill; be careful because it’s fragile
Hot Plate	For heating substances	Wear safety goggles, gloves; -takes a while to cool down; -tie hair back -use tongs
Graduated cylinder	-Measuring liquids, powders. -Mix substances. -Very accurate measuring.	-Can be fragile. -Can easily tip over, be careful. -No hot substances in plastic.
Test tube	-Combining substances; -heating; -observing.	-Fragile, does not stand on its own. Use a stand.
Funnel	Pouring liquids into small containers	Pour slowly to avoid spills
Beaker Tongs	Picking up hot beakers	-Pick beaker up securely at top or in the middle. -Move slowly to avoid spills.
Microscope	Viewing microscopic specimens	They are expensive and fragile; be careful.
Triple Beam Balance	Weighing objects	-Be gentle with balance -Make sure objects are secure
Thermometer	Measuring temp.	Fragile, be gentle
Stirring rod	For stirring mixtures	-Be careful it’s fragile -Stir slowly to avoid spills.
Erlenmeyer Flask	Sealable container, good for heating	Fragile, use gloves when hot.

Grade 7 Science Safety Test

The test will be on Monday September 23rd for 7A, 7B, 7C and 7E and on Tuesday September 24th for 7D.

The test outline is as follows:

1. Identify the problems and solutions in the image

2. Know what WHMIS means and the names of its symbols

3. Know what HHPS means and the names of its symbols

Know precautions for HHPS products

4. Study the names of the science equipment in the package and their uses and safety precautions

5. Review the safety features in the lab; for example, the eye wash station, fire extinguisher, etc.

Good Luck!

Grade 8 Math Homework

1. Page 22: All questions

2. Double sided "Powers" worksheet

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