Glossary: Terms Starting with H

habit

ScienceFrom Grade 3

something we do regularly

Learn it in: Healthy habits (Grade 3)

habitable zone

ScienceFrom Grade 6

the region where liquid water can exist

Learn it in: Earth in the Solar System (Grade 6)

habitat

ScienceFrom Grade 1

the place where a plant or an animal lives

Full explanation with examples and practice →

Learn it in: Living things in our surroundings (Grade 1), Caring for animals (Grade 1), Natural surroundings (Grade 1)

habitat loss

ScienceFrom Grade 4

the destruction of a place where organisms live

Learn it in: Human impacts (Grade 4)

habitat restoration

ScienceFrom Grade 6

repairing a damaged habitat

Learn it in: Biodiversity conservation (Grade 6)

hail

ScienceFrom Grade 5

balls of ice from storm clouds

Learn it in: Precipitation (Grade 5)

hand lens

ScienceFrom Grade 2

a tool that makes small things look bigger

Learn it in: Reviewing scientific observation (Grade 2), Scientific equipment (Grade 3)

hard

ScienceFrom Grade 1

difficult to press or bend

Learn it in: Hard and soft materials (Grade 1), Solid materials (Grade 2)

hardness

ScienceFrom Grade 3

how hard a material is

Learn it in: Rock properties (Grade 3), Rock properties (Grade 4)

harmattan

ScienceFrom Grade 2

a dry dusty wind in West Africa

Learn it in: Seasonal changes (Grade 2)

harvest

ScienceFrom Grade 2

to gather ripe crops

Learn it in: Science in farming (Grade 2), Weather and farming (Grade 3)

hat

ScienceFrom Grade 1

something worn on the head

Learn it in: Sunny weather (Grade 1)

hatch

ScienceFrom Grade 2

to come out of an egg

Learn it in: Animal offspring (Grade 2)

hazard

ScienceFrom Grade 2

something that can cause harm

Learn it in: Weather safety (Grade 2), Electrical safety (Grade 2), Electricity in everyday life (Grade 4)

hazardous

ScienceFrom Grade 1

dangerous

Learn it in: Proper waste disposal (Grade 1)

head

ScienceFrom Grade 1

the part with the eyes, mouth and ears

Learn it in: Animal body parts (Grade 1), External body parts (Grade 1)

heading

ScienceFrom Grade 3

a title for a column or section

Learn it in: Recording results (Grade 3), Recording results (Grade 4)

health

ScienceFrom Grade 2

how well your body and mind are

Learn it in: Science in health (Grade 2)

healthy

ScienceFrom Grade 1

well and strong

Learn it in: Animal needs (Grade 1), Healthy food (Grade 1)

hearing

ScienceFrom Grade 1

listening with our ears

Learn it in: Using our senses to observe (Grade 1), The five senses (Grade 1), Protecting our hearing (Grade 1)

heart

ScienceFrom Grade 3

the organ that pumps blood

Learn it in: Major internal organs (Grade 3), Circulatory system (Grade 5)

heat

ScienceFrom Grade 4

energy that moves because of temperature difference

Learn it in: Heating and cooling (Grade 4), Heat energy (Grade 5)

heatwave

ScienceFrom Grade 3

a long period of very hot weather

Learn it in: Extreme weather (Grade 3)

heavier

ScienceFrom Grade 1

feels harder to hold up

Learn it in: Comparing objects (Grade 1), Comparing objects (Grade 2)

height

ScienceFrom Grade 2

how tall something is

Learn it in: Seedling growth (Grade 2)

heliocentric

ScienceFrom Grade 6

Sun-centred

Learn it in: Planetary motion (Grade 6)

helpful

ScienceFrom Grade 1

making life easier or safer

Learn it in: Science in everyday life (Grade 1)

hemisphere

ScienceFrom Grade 4

half of Earth

Learn it in: Earth’s rotation (Grade 4), Seasons (Grade 6)

herb

ScienceFrom Grade 3

a plant with a soft stem

Learn it in: Stem functions (Grade 3)

herbivore

ScienceFrom Grade 1

an animal that eats only plants

Learn it in: Animal food (Grade 1), Consumers (Grade 3), Producers and consumers (Grade 4)

herd

ScienceFrom Grade 2

a group of grazing animals

Learn it in: Grassland habitats (Grade 2)

hertz

ScienceFrom Grade 4

the unit of frequency

Learn it in: Vibrations (Grade 4)

hibernate

ScienceFrom Grade 2

to sleep through a harsh season

Learn it in: Weather and living things (Grade 2), Animal adaptations (Grade 3)

high-pitched

ScienceFrom Grade 4

having a high note

Learn it in: Pitch (Grade 4)

highest

ScienceFrom Grade 3

the largest value

Learn it in: Weather records (Grade 3)

hill

ScienceFrom Grade 1

high land smaller than a mountain

Learn it in: Natural surroundings (Grade 1)

hinge joint

ScienceFrom Grade 4

a joint that moves back and forth

Learn it in: Joints (Grade 4)

hive

ScienceFrom Grade 1

a home for bees

Learn it in: Animal shelters (Grade 1)

hold

ScienceFrom Grade 1

to keep in place

Learn it in: Roots (Grade 1)

homeostasis

ScienceFrom Grade 5

keeping the body steady

Learn it in: Interactions among body systems (Grade 5), Organisation of living systems (Grade 6)

hook

ScienceFrom Grade 2

a bent part that sticks to fur or clothes

Learn it in: Seed dispersal (Grade 2)

hooks

ScienceFrom Grade 3

small curved parts that stick to fur

Learn it in: Seed dispersal (Grade 3)

hop

ScienceFrom Grade 1

to jump on one or two feet

Learn it in: Animal movement (Grade 1)

horizon

ScienceFrom Grade 4

where the sky meets the land

Learn it in: Apparent movement of the Sun (Grade 4)

hormone

ScienceFrom Grade 6

a chemical messenger in the body

Learn it in: Puberty and physical development (Grade 6)

hot

ScienceFrom Grade 1

very warm

Learn it in: Sunny weather (Grade 1)

household

ScienceFrom Grade 2

relating to a home

Learn it in: Science at home (Grade 2)

human-made

ScienceFrom Grade 1

made by people

Learn it in: What is the environment (Grade 1)

humidity

ScienceFrom Grade 5

how much water vapour is in the air

Learn it in: Evaporation and condensation (Grade 5)

humus

ScienceFrom Grade 3

rotted plant and animal matter

Learn it in: Soil components (Grade 3), Soil formation (Grade 4)

hydroelectric

ScienceFrom Grade 5

electricity made from moving water

Learn it in: Energy applications (Grade 5), Renewable resources (Grade 6)

hydrosphere

ScienceFrom Grade 5

all the water on Earth

Learn it in: Earth’s major systems (Grade 5), Hydrosphere (Grade 5)

hygiene

ScienceFrom Grade 1

habits that keep us clean and healthy

Learn it in: Personal hygiene (Grade 1), Uses of water (Grade 2), Science at home (Grade 2)

hypothesis

ScienceFrom Grade 3

a testable idea that explains something

Learn it in: Predictions (Grade 3), Testable predictions (Grade 4), Hypotheses and predictions (Grade 5)