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Science 6 1st Midterm exam review
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Pregnant women are advised not to eat shark, marlin, and swordfish. Why? (Clue: mercury is present in our oceans)
Because of biomagnification, sharks, swordfish, and marlin may contain enough mercury to damage the unborn baby.
Is there an omnivore in the food web? If so, which organism is it?
There are no omnivores! (Tip: look at the arrows pointing away from the plants)
How much time is needed for a fertilised egg to develop and be born as a baby?
9 months
True or False. Only boys grow taller during puberty
False! Both boys and girls grow taller during puberty
True or False: The parts of the circulatory system are the heart, blood, lungs, and blood vessels (arteries, veins, capillaries)
False! Lungs are not included in the circulatory system.
What are the names of the two organs?
Kidney and brain
Plankton eat the pollutants in the ocean. The plankton are eaten by the small fish, which are then eaten by other consumers. The concentration of pollutants increases in the higher members of the food chain. What process is this?
biomagnification
In a polluted environment, mercury builds up inside the fish over time. This is called
bioaccumulation
The farmer sprays DDT on his field to kill the grasshoppers eating his wheat. If DDT is also poisonous to peregrine falcons, what will happen to its population?
The falcons population will decrease (trivia: DDT makes the egg shells too soft)
Mercury that reaches the ocean is taken in by zooplankton. The picture shows a food chain containing zooplankton. (c) Which organism is the most likely to have a severely reduced population due to mercury poisoning? Explain your answer
The fish-eating bird. Because the fish-eating bird is at a high level in the food chain, it gets high levels of mercury as it eats the large fish
The position of an organism in a food chain
trophic level
The habitat of the organisms in this food web are polluted! Which organism would have the highest concentration of toxins?
The hawk/ tertiary consumer
What are the producers in this food web?
Leaves; grass
Identify 2 animals that are both prey and predator at the same time.
Sunspider and Lizard
Which organism gives energy to the fox and owl?
rabbit or sparrow
Make a food chain using all organisms in the picture
Wheat -> Grasshopper -> Meadowlark -> Peregrine Falcon
True or False - A regular menstruation cycle is a sign of healthy reproductive organs
True
Which of the following is not a social/ emotional change during puberty?
Letter B - becoming emotionally mature. Puberty is a journey towards emotional maturity. Not yet mature!
The process when a female body releases the lining of the uterus and blood through the vagina
menstruation
Which change happens to FEMALES only?
Letter C - body becomes curvier
This part transports eggs from the ovary to the uterus
Oviducts / Fallopian tube
In vasectomy, the vas deferens of the male is cut and tied. Can the man still have children? Why/ Why not?
If the vas deferens is cut, the sperm cannot travel from the testes to the urethra. The male can not have children anymore.
A woman had her fallopian tubes removed due to cancer. Can she still become pregnant?
No, an egg can’t travel from the ovaries to meet sperm
This part of the male reproductive system also plays a role in the excretory system
urethra
What do you call the female reproductive cells
Egg cells
What does the red color of blood mean in this drawing?
Blood rich in oxygen
Based on the chart, which is the most physically intense activity?
Karate
Give two ways to prevent heart disease
Eat a healthy, balanced diet; Be more physically active; Give up smoking; Keep a healthy weight; Keep blood pressure under control
Which side of the heart contains blood poor in oxygen (deoxygenated)
The right side
Explain the difference between pulse and heartbeat.
Pulse is the wave caused by blood as it is pumped by the heart. Heartbeat is the contraction of the heart to make blood move out
Check the picture of human organs. Is everything correct? If not, which is incorrect?
The "kidney" label is wrong. It should be stomach
Which organ (A,B,C,D) is used by the cat to exchange carbon dioxide with oxygen?
Organ A
Which organ finishes digestion and absorbs nutrients from the food?
Small Intestine
Which organ removes excess water and filters waste from the blood?
kidneys
What is the biological function of the heart?
Pumps blood to all parts of the body
The union of sperm and egg cells
Fertilisation