Chemical World
A __________ is a pure substance composed of two or more different elements that are held together by chemical bonds
The equation for speed is __________ divided by _____________.
distance divided by time
What was the name of the scientist responsible for the theory of evolution?
Charles Darwin
A h_________ is an ecological or environmental area that is inhabited by and supports the needs of an animal.
Habitat
The name of this compound (NH4NO3) is...
Ammonium nitrate
Vector quantities are measured with numbers and units but also have a specific ____________.
direction
The basis behind the theory of evolution is n_________ s________.
natural selection
The temperature of an environment would be considered an _________ factor.
Abiotic
The general word reaction for combustion is:
fuel + oxygen -> carbon dioxide + water
acceleration is measured by the _____________ divided by ___________.
Which statement is supported by a scientific theory of evolution?
a) Individual animals that survive and reproduce are the least adapted to the environment in which they live.
b) Most animals produce less offspring than their environment can support.
c) The environment has no influence on the survival chances of animals.
d) Variations in the offspring of animals can influence their chance of survival.
d) Variations in the offspring of animals can influence their chance of survival.
The study of Earth using gravity, magnetic, electrical and seismic methods is known as _________.
Geophysics
The reaction between hydrochloric acid and sodium hydroxide would be considered as what type of reaction?
A block sitting on a table has 78 N of force applied upwards from the table. Determine the amount of force gravity applies to the block in N.
78N down (balanced forces)
Arctic fish contain a kind of antifreeze in their blood, allowing them to survive in waters that would freeze the blood of other fish. This is known as a __________ adaptation.
Metabolic/physiological
Adding genes from arctic sharks (that are resistant to freezing temperatures) to strawberries can prevent crop losses when temperatures fall to low levels. This technology is known as _________ _______________.
genetic modification/genetic engineering.
Identify the missing products in the following word equation:
acid + metal -> _________ + ___________
salt + hydrogen
A car (4000kg) is accelerating at 0.5 ms-2. Find the driving force produced by the engine.
F = m x a = 4000 kg x 0.5 ms-2 = 2000N
Brown eyes are dominant over blue eyes, where B = and b = blue. For two heterozygous brown eyed parents (Bb), list the genotypes of the children and the percentage chance of a child inheriting each genotypic variation.
BB - 25%
Bb - 50%
bb - 25%
For sheep A and sheep B, a mammary cell is extracted from sheep A and an egg with the nucleus removed is extracted from sheep B. An electric pulse fuses the mammary cell and egg cell. The final cloned sheep will have the same genetic material as which sheep?
Sheep A