The photograph shows a bumble bee at a magnification of x6. The line shows the length of the bumble bee.
Three food tests are carried out on a sample of food. The results are shown in the table.
Four test-tubes were set up as shown. Which test-tube will contain the most dissolved oxygen after 24 hours?
Which term is defined as the movement of digested food molecules into the cells of the body where they are used?
Which graph shows the concentration of sugar solution found in phloem and xylem?
A child blows into a rubber balloon. What is the percentage of oxygen inside the balloon?
The diagram shows the female reproductive system. Where does fertilisation usually occur?
Cystic fibrosis is an inherited condition caused by a recessive allele. A man and woman have a child who has cystic fibrosis. Neither parent has the condition. What is the probability of their next child also having cystic fibrosis?
Dung beetles lay their eggs in the faeces of plant-eating mammals like buffalo. Both the adult beetles and their young stages eat the undigested food in the faeces. Which diagram shows this food relationship
What does not contribute to the carbon cycle?
The structures of some substances are shown.
Pure substance X has a melting point of 110 C. The melting point ranges of four impure samples of substance X are measured. What is the melting point range of the most impure sample of substance X?
Which statement about a carbon dioxide molecule is correct?
Apparatus used for electrolysis is shown. Which label identifies the electrolyte?
The catalytic converter in the exhaust of a car brings about the reaction shown.
Three different tests are carried out on an aqueous solution of substance X. The results are shown.
What reacts with ammonia gas?
Substance Q is added to cold water. It floats on the water and hydrogen gas is made. What is Q?
Which statements describe carbon?
The apparatus used to investigate the combustion of ethanol is shown. The products of combustion are passed over anhydrous cobalt(II) chloride
Other than hydrogen and oxygen, which substance provides only one of the essential elements for plant growth?
What is the chemical name for lime?
What is the main constituent of natural gas?
Which row shows the structure of the monomer used to make poly(ethene) and the structure of a section of poly(ethene)?
Which distance–time graph represents an object that is decelerating?
A vehicle moves a total distance of 300 m in 40 seconds. What is its average speed?
Which statement applies to a system in equilibrium?
The diagram shows a man diving into water.
Which two quantities are used to calculate power?
Which row shows a good thermal conductor and a bad thermal conductor?
The diagram shows a ray of light striking a converging lens.
Sound from a loudspeaker at P travels directly to Q. Sound also reaches Q after being reflected from a wall at R.
Which circuit shows an ammeter that measures the current in the lamp and a voltmeter that measures the potential difference (p.d.) across the lamp?
A student connects a circuit as shown.
A student connects the circuit shown.
The diagrams each show a wire carrying a current in the direction of the arrow. Which diagram shows the pattern and the direction of the magnetic field around the wire?
A radioactive nucleus emits a -particle. What happens to the proton number (atomic number) of the nucleus?
