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It is a list of metals arranged in order of their ability to react with other substances, such as water, acids, and oxygen.
Answer: Reactivity series
Complete the statement. Aerobic respiration takes place in the _________ while anaerobic respiration takes place in the ______________.
Aerobic respiration takes place in the mitochondria while anaerobic respiration takes place in the cytoplasm.
One of the oldest ecosystems on the planet is the Daintree Forest which can be found in ____________.
Answer: Australia
Complete the word equation.
metal + water-----> _____________+ hydrogen
metal + water-----> metal hydroxide+ hydrogen
It can be found in detergents that can cause an overgrowth of water plants.
Answer: Phosphates
Arrange the following parts of the respiratory system when oxygen goes inside the body.
Pharynx, Nose, Trachea, Alveoli, Larynx, Bronchioles, Bronchi
Answer: Nose-Pharynx-Larynx-Trachea-Bronchi-Bronchioles-Alveoli
Describe the amount of energy transferred from one organism to another as the food chain goes further.
Answer: The amount of energy decreases.
A Welsh biologist who had seen other animals also fitted into Philip Sclater's system of realms.
Answer: Alfred Russel Wallace
These are large areas of land and oceans.
Answer: Biogeographical realms
This makes the red blood cell bright red in colour.
Answer: Oxyhemoglobin
Arrange the following metals (lead, copper, zinc, magnesium) on their reactivity with hydrochloric acid.
Answer: Magnesium, Zinc, Lead and Copper
How is hydrogen gas being tested?
Answer: Put a burning splint near the mouth of a test tube containing hydrogen and a popping sound is heard.
State the arrangement of the layers of the rainforest from top to bottom.
Emergent layer
Canopy
Understory
Forest floor
State the word equation when magnesium reacts with dilute hydrochloric acid.
Answer: Magnesium + hydrochloric acid -----> Magnesium chloride + Hydrogen gas
Define ecology.
Answer: It is the study of living things in their environment.
How do platelets help in blood clotting?
Platelets are involved in blood clotting by sticking to the site of a wound or injury and clumping together.
Which metals react with water to form hydrogen gas?
Metals like sodium, potassium, calcium, and magnesium react with water to produce hydrogen gas.
What are the four components of blood? State their functions.
Answer: Red blood cells- carry oxygen
White blood cells- fight infection
Plasma- Transports carbon dioxide, glucose, vitamins and minerals
Platelets- prevent or stop bleeding
What is the role of the diaphragm in the respiratory system?
Define fertilizers.
Answer: Fertilizers are substances that are used to make crop plants grow faster and larger
Give two effects or consequence of the spread of invasive species.
Competition and extinction
What happens if one organism is removed from a food chain?
If one organism is removed from a food chain, it can disrupt the entire ecosystem.
How does the reactivity of metals with oxygen change across the reactivity series?
Metals at the top of the reactivity series, like potassium and sodium, react more vigorously with oxygen. As you move down the series, metals like gold and platinum are less reactive and do not readily react with oxygen.
How can litter harms wildlife in ecosystem?
Animals may ingest or become entangled in litter, leading to injury or death.
Why is potassium's reaction with water more dangerous than that of sodium?
As the reaction of potassium produces more heat, which can cause the hydrogen gas to ignite, potentially leading to an explosion.