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Mid-term exams
Study notes for science mid-terms grade 9
28
Science
9th Grade
01/27/2013

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Cards

Term
List safety rules in the lab (at least 5)
Definition
-work under supervision -know the procedure -know how to use lab equipment -use the appropriate protective equipment -no loose clothing -no eating or drinking -no horseplay -know location of all emergency equipment
Term
What does WHMIS stand for?
Definition
Workplace, hazard, materials, information, system
Term
What is the purpose of WHMIS?
Definition
To guide workers that use hazardous materials.
Term
What is a chemical change?
Definition
Chemical changes take a/some substance(s) and create a/some new substance(s) (Ex. Breathing, digestion)
Term
What is physical change?
Definition
Change of state. No new substances are formed.
Term
What is solid to liquid called?
Definition
melting
Term
What is liquid to solid called?
Definition
solidification
Term
What is solid to gas called?
Definition
sublimation
Term
What is gas-solid called?
Definition
deposition
Term
What is liquid to gas called?
Definition
evaporation
Term
What is gas to liquid called?
Definition
condensation
Term
What is KMT? What does it stand for?
Definition
The Kinetic Molecular theory. The idea of physical change is based on KMT.
Term
What is the ratio of a nucleus to an atom? (Give an example)
Definition
It is tiny. If the atom was the size of a football field, the nucleus would be the size of a pea.
Term
What are compounds?
Definition
Compounds are two or more elements combined together by chemical bonding.
Term
What are covalent bonds?
Definition
They share electrons, are a non-metal. Example: Sugar, water, air.
Term
What are Ionic bonds?
Definition
Transfer electrons, both metal and non-metal, polyatomic ions (NH42) Examples: Salt (table salt, epson salts,fertilizer)
Term
Examples of a chemical change?
Definition
temperature change, bubbling/fizzing, colour change, smell/taste, heat increases (exothermic)heat decreases (endothermic)
Term
How many chromosomes do humans have?
Definition
46
Term
Two special proteins are:
Definition
enzymes (catalysts) and hormones (messengers)
Term
Three types of mutations:
Definition
positive mutation: benefits the organism
negative mutation: harms the organism
neutral mutation: does nothing
Term
What is gene therapy?
Definition
The replacing of a negative mutation with a positive one.
Term
What is the most common form of asexual reproduction?
Definition
mitosis
Term
During growth of mitosis, what happens?
Definition
proteins are made, organelles are duplicated, the cell gets bigger, checkpoints
Term
Stages of mitosis?
Definition
prophase, metaphase, anaphase, and telophase
Term
How many parents are required for asexual reproduction?
Definition
One.
Term
Forms of asexual reproduction are...
Definition
fragmentation, budding, spores, vegetive. binary fission (human assisted)
Term
What is therapeutic cloning for? (in humans)
Definition
It is used to correct health problems. Different forms of stem cells can be used for this.
Term
What are the forms of sexual reproduction?
Definition
Meiosis (gamete formation,) internal, external
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