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Complete the sentences given: Carbon dioxide is produced in body cells by the process of ........................ . Carbon dioxide is removed from the blood in the .......................... .
Carbon dioxide is produced in body cells by the process of DIFFUSION. Carbon dioxide is removed from the blood in the LUNG/ALVEOLI.
Alkene is produced during process X. What is X? Does it involves physical or chemical change?
X is the cracking reaction! This process is a chemical change as new substance is formed.
Reaction of X with acid leads to the equation below. Can you predict X?
Sodium carbonate, as it produces carbon dioxide!
Based on the info given, what is the neutron number of zinc?
35! Nucleon number - proton number = neutron number
Anaemia is a medical condition. A person with anaemia has fewer red blood cells than normal. Suggest why anaemia can cause a person to have less energy.
Red blood cells transport oxygen. When there is less oxygen, the respiration rate decreases as well. Respiration releases energy.
Describe two physical properties of copper (transition element) that are NOT properties of sodium (Group 1).
Copper has catalytic properties and can form coloured compound. They also have high melting point.
Describe two differences between the arrangement of atoms in solid copper and the arrangement of atoms in molten copper.
Solid copper is in fixed position AND has fixed arrangement (vice versa).
Diagram shows the muscle cell. What is the function of B? Which characteristic of living organism is the muscle cell in charge of?
B is in charge of the metabolic reactions, and this cell is important for the movement!
Name the mineral ion that the plant must absorb to make chlorophyll! Which vessel do they travel in?
Magnesium ions and they travel in the xylem vessel :D
Mayflies eat pondweed. Trout eat mayflies. Herons eat trout. Construct a food chain using this information!
pondweed -> mayflies -> trout -> herons
Graph shows the number of patients with heart diseases according to age group. State 1 SIMILARITY and 1 DIFFERENCE between male and female.
Similarity: number of patients increases as age increases. Difference: Female is lower than male for all age group.
Based on the air composition, which one of it is the compound? Explain your answer!
Carbon dioxide, it consist of more than 2 elements: carbon & oxygen
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