Revision

• Science
• Upper Secondary (Key Stage 4)
• GCSE

Revision

What is the smallest particle of an element that retains its chemical properties?

1. Compound
2. Molecule
3. Proton
4. Atom

Who is credited with the discovery of the electron within the atom?

1. Niels Bohr
2. Ernest Rutherford
3. Marie Curie
4. J.J. Thomson

What is the nucleus of an atom made up of?

1. Protons and neutrons
2. Electrons and protons
3. Neutrons and electrons
4. Protons and electrons

What is the total charge of an atom?

1. Positive
2. Negative
3. Depends on the element
4. Zero

Which subatomic particle determines the identity of an element?

1. Neutron
2. Electron
3. Quark
4. Proton

What is a covalent bond?

1. A bond formed by repelling electrons.
2. A chemical bond formed by sharing electrons.
3. A bond formed by opposite charges attracting.
4. A bond formed by transferring electrons.

What type of bond is formed between a metal and a nonmetal?

1. Metallic bond
2. Covalent bond
3. Hydrogen bond
4. Ionic bond

What is the force that holds water molecules together?

1. Hydrogen bonding
2. Nonpolar covalent bonding
3. Ionic bonding
4. Polar covalent bonding

What type of bond is formed between hydrogen and fluorine?

1. Nonpolar covalent bond
2. Polar covalent bond
3. Ionic bond
4. Metallic bond

What is the strongest type of chemical bond?

1. Van der Waals bond
2. Hydrogen bond
3. Covalent bond
4. Ionic bond

What is the outer boundary of a cell called?

1. Cytoplasm
2. Cell wall
3. Nucleus
4. Cell membrane

Which organelle is responsible for protein synthesis?

1. Ribosome
2. Lysosome
3. Golgi apparatus
4. Endoplasmic reticulum

What is the powerhouse of the cell?

1. Chloroplast
2. Nucleus
3. Vacuole
4. Mitochondria

Which structure stores genetic material in a cell?

1. Endoplasmic reticulum
2. Cell membrane
3. Nucleus
4. Cytoplasm

Where does photosynthesis occur in plant cells?

1. Vacuole
2. Ribosome
3. Chloroplast
4. Cell wall

What is the primary pigment involved in photosynthesis?

1. Carotene
2. Phycobilin
3. Chlorophyll
4. Xanthophyll

Where does photosynthesis primarily occur in plants?

1. Nucleus
2. Chloroplasts
3. Mitochondria
4. Cell Membrane

What gas is utilized in the process of photosynthesis?

1. Methane
2. Carbon Dioxide
3. Nitrogen
4. Oxygen

What is the process of arranging organisms into groups based on similarities?

1. Classification
2. Evolution
3. Identification
4. Categorization

Which of the following is a taxonomic rank used in biological classification?

1. Order
2. Genus
3. Species
4. Family

Which classification system is widely used to organize and name organisms?

1. Darwinian system
2. Mendelian system
3. Lamarckian system
4. Linnaean system

What is homeostasis?

1. The body's ability to maintain stable internal conditions
2. The body's response to external stimuli
3. The process of breaking down food for energy
4. The regulation of emotional well-being

Which body system plays a key role in homeostasis?

1. The endocrine system
2. The muscular system
3. The skeletal system
4. The digestive system

What is an example of homeostasis in the human body?

1. Regulation of body temperature
2. Growth of muscle tissue
3. Formation of new blood cells
4. Digestion of food

How does the body regulate blood sugar levels?

1. By producing more red blood cells
2. By releasing adrenaline
3. Through the action of insulin and glucagon
4. By increasing heart rate

What can disrupt homeostasis in the body?

1. Stress and illness
2. Regular exercise
3. Getting enough sleep
4. Drinking water

Which hormone regulates metabolism and energy production?

1. Thyroid hormone
2. Testosterone
3. Estrogen
4. Insulin

Which hormone is responsible for the fight or flight response?

1. Melatonin
2. Adrenaline
3. Progesterone
4. Cortisol

Which hormone is known as the 'feel-good' hormone?

1. Growth hormone
2. Prolactin
3. Glucagon
4. Serotonin

Which hormone is essential for proper blood sugar regulation?

1. Cortisol
2. Insulin
3. Thyroxine
4. Estrogen