Recall Flashcards
Learn all 30 science recall questions.
Which two sub-atomic particles are found in the nucleus of an atom and what are their relative charges.
Protons +1
Neutrons =
What do we call the part of an atom where electrons are found?
Energy level/shell
What do you call the columns and rows on the periodic table?
The columns are called groups and the rows are called periods?
What do all the elements in the same group on the periodic table have in common?
They have the same number of electrons on the outer-shell giving them similar properties.
What does the atomic number tell you about an element
How many protons there are in one atom of that element.
What does the mass number tell you about an element?
How many protons and neutrons are in one atom of an element.
What is an atom?
The smallest part of an element that can exist.
What is an element?
A substance made from only one type of atom.
What is a compound?
Two or more different elements chemically combined in fixed proportions?
What is a mixture?
Two or more elements or compounds not chemically combined.
What is an isotope?
Atoms of the same element with a different number of neutrons.
What does the law of the conservation of mass state?
The mass of the reactants and the mass of the products in a chemical reaction are equal.
What equation is used to calculate magnification?
Image size/Actual size.
Three disadvantages of an electron microscope.
1) You have to have a thin coating of metal added to the specimen before putting them in a vacuum chamber.
2) They are large and cannot be easily moved.
3) They are very expensive.
List the organs from the digestive system in order that food passes through them.
Mouth, Oesophagus, Stomach, The small then large intestine, Rectum, Anus.
What is the function of the hydrochloric acid in the stomach?
To help destroy bacteria and to make the correct pH for the enzyme protease to work effectively.
What are the three main digestive enzymes, what do they break down and which products are formed as a result?
Protease-Protein-Amino Acids.
Amylase-Starch-Glucose.
Lipase-Lipids and Fats-Fatty acids and glycerol.
What word equation does represent aerobic respiration?
Oxygen and glucose— H20+CO2+Energy.
Where does aerobic respiration take place?
Mitochondria in all cells of the body.
List the structures in order that oxygen from the air travels through to get into the blood.
Mouth and nasal passages,
Trachea,
Bronchi,
Lungs (Bronchioles, then alveoli the blood.)
What is the link between volume and pressure?
The greater the volume, the smaller the pressure. The smaller the volume the greater the pressure.
What word equation represents anaerobic respiration?
Glucose—Lactic Acid and Energy.
How are the alveoli adapted for gas exchange?
Large surface area,
Good blood supply.
Thin walls,
Moist Lining.
What is the function of the red blood cells?
The main job of red blood cells is to transport oxygen (by reacting the oxygen with haemoglobin in the red blood cells to form oxyhaemoglobin) from the lungs to all cells in our body so respiration can take place.
What is the function of the white blood cells?
The main job of the white blood cells is to provide an immune system to defend against pathogens carrying out phagocytosis, making antibodies and antitoxins.
What is the function of platelets?
They help the blood clot.
What is the function of the plasma?
It helps blood flow and carries substances like glucose, amino acids, hormones and waste products.
What is the gas produced when an alkali metal is added to water?
Hydrogen.
What happens to the reactivity of the alkali metals as you go down the groups?
It increases.
What are the names of groups 1, 7 and 0 on the periodic table?
Alkali,
Halogens,
Nobel Gases.
