Photosynthesis
Name the process that plants use to make their own food.
Photosynthesis
The ray of light that leaves the mirror after reflection.
reflected ray
The pitch of sound depends on ............
frequency
Two tectonic plates move away from each other. This process is known as ..............
diverging tectonic plate
the scientist who introduced the theory of natural selection.
charles darwin
Plants absorb …….. from the environment as one essential substance to produce their own food during photosynthesis
Carbon dioxide
i refers to ........
incident ray
An object that vibrates 200 times in three
minute has a frequency of ...........
1.1 Hz
The Earth is made up of three different types of rock. Mention them.
sedimentary, methamorphic and igneous
Give 1 importance of DNA for living organism.
genetic information
Plants store excess __________ in the form of starch.
Glucose
What optical device is used to separate white light into its different colors through the process of dispersion?
triangular prism
What is the difference between loudness and pitch?
loudness: volume of sound
pitch: frequency
It is the thin, solid, outermos t layer where we live, and it forms the Earth's surface.
crust
Segments of DNA(Deoxyribonucleicacid) found in chromosomes that give instructions for producing a certain characteristic.
gene
It helps regulate Earth’s climate by controlling the levels of CO₂, a greenhouse gas, in the atmosphere. It is essential for maintaining a balance that supports life on Earth, is a function of.........
carbon cycle
what causes refraction?
when light travels from a denser medium to a less dense medium, it speeds up and bends away from the normal line
The hearing range of human ear is ..............
20 Hz to 20,000 Hz
free points
free points
XX + XY means .......
50% XX and 50% XY
An essential nutrient that plays a key role in the production of chlorophyll, which is needed for photosynthesis.
Magnesium
Mr Richie shines blue light and green light onto bluepaper. Describe what happens to the blue light and the green light.
blue light and no light (absorbed)
The deepest part of the oceans in the world is the Mariana Trench in the Pacific Ocean. It is 12000 m deep. How long will it take for sound transmitted by a ship from above the trench to be reflected? Speed of sound in water is about 1480 m/sec.
16.2 secs
the result of hot mantle material rising and cooler material sinking, creating a cycle.
convection current
What other factor that also influence the variation of living things?
environmental