Meaning: a signal or alert given in advance of a potential problem.

Part of speech: phrase

Example: The early warning system detected the storm.

Category: Science › Meteorology

Synonyms:

• alert
• notification

Meaning: the planet we live on.

Part of speech: noun

Example: Earth is the third planet from the sun.

Category: Science › Geography

Synonyms:

• world
• planet

Meaning: a sudden shaking of the ground caused by movements of the earth's tectonic plates.

Part of speech: noun

Example: The earthquake caused significant damage to the buildings.

Category: Science › Geology

Synonyms:

• quake
• tremor

Meaning: the study of the earth and its processes.

Part of speech: noun

Example: Earth science includes geology and meteorology.

Category: Science › Geology

Synonyms: geoscience

Meaning: a human being, especially in a science fiction context.

Part of speech: noun

Example: The alien was curious about earthlings.

Category: Science › Anthropology

Synonyms:

• human
• person

Meaning: a cage filled with earth or stones, used in construction

Part of speech: noun

Example: The workers built a gabion to prevent erosion.

Category: Science › Engineering

Synonyms:

• cage
• basket

Meaning: a chemical element used in various technologies

Part of speech: noun

Example: Gadolinium is used in MRI contrast agents.

Category: Science › Chemistry

Synonyms:

• element
• metal

Meaning: relating to a galaxy

Part of speech: adjective

Example: The galactic center is fascinating to astronomers.

Category: Science › Astronomy

Synonyms:

• cosmic
• stellar

Meaning: a large system of stars, gas, and dust

Part of speech: noun

Example: The Milky Way is a spiral galaxy.

Category: Science › Astronomy

Synonyms:

• star system
• cosmos

Meaning: a chemical element used in electronics

Part of speech: noun

Example: Gallium is used in semiconductors.

Category: Science › Chemistry

Synonyms:

• element
• metal

Meaning: a unit of measurement for liquid, equal to 3.785 liters

Part of speech: noun

Example: He bought a gallon of milk.

Category: Science › Measurement

Synonyms:

• liter
• measure

Meaning: suitable for living in

Part of speech: adjective

Example: The planet is habitable for humans.

Category: Science › Astronomy

Synonyms:

• livable
• inhabitable

Antonyms:

• uninhabitable
• desolate

Meaning: a mineral form of iron oxide

Part of speech: noun

Example: Haematite is often used in jewelry.

Category: Science › Geology

Synonyms:

• iron ore
• mineral

Meaning: a chemical element with the symbol Hf

Part of speech: noun

Example: Hafnium is used in nuclear reactors.

Category: Science › Chemistry

Synonyms:

• element
• metal

Meaning: A period of time when large areas of the Earth were covered with ice sheets.

Part of speech: noun

Example: The last ice age ended about 11,700 years ago.

Category: Science › Geology

Meaning: A thick layer of ice covering a large area, typically at the poles.

Part of speech: noun

Example: The ice cap is melting due to climate change.

Category: Science › Climate

Meaning: A large, thick layer of ice covering a land area, especially in polar regions.

Part of speech: noun

Example: The ice sheet is crucial for regulating the Earth's climate.

Category: Science › Glaciology

Meaning: A floating platform of ice that forms where a glacier or ice sheet meets the ocean.

Part of speech: noun

Example: The ice shelf is breaking apart due to warming temperatures.

Category: Science › Glaciology

Meaning: A suffix used in chemistry to denote a binary compound or an anion.

Part of speech: suffix

Example: The word 'chloride' includes the suffix '-ide'.

Category: Science › Chemistry

Meaning: a tube-shaped optical instrument that creates colorful patterns

Part of speech: noun

Example: The children played with a kaleidoscope to see different designs.

Category: Science › Optics

Meaning: a type of clay used in ceramics

Part of speech: noun

Example: Kaolin is essential for making fine porcelain.

Category: Science › Materials

Meaning: an abbreviation for kilocalorie, a unit of energy

Part of speech: noun

Example: This snack contains 200 KC.

Category: Science › Nutrition

Meaning: a unit of temperature measurement

Part of speech: noun

Example: Water freezes at 273.15 kelvin.

Category: Science › Physics

Meaning: A type of protein that forms hair, nails, and the outer layer of skin.

Part of speech: noun

Example: Keratin helps protect our skin from damage.

Category: Science › Biology

Meaning: The inner part of a seed or nut.

Part of speech: noun

Example: The kernel of the corn is sweet and tender.

Meaning: a place for scientific work

Part of speech: noun

Example: The students conducted experiments in the lab.

Category: Science › Laboratory

Synonyms: laboratory

Meaning: a controlled environment for scientific experiments

Part of speech: noun

Example: The laboratory is equipped with modern tools.

Category: Science › Research

Synonyms: lab

Meaning: to produce milk

Part of speech: verb

Example: Cows lactate to feed their calves.

Category: Science › Biology

Meaning: an acid produced in muscles during exercise

Part of speech: noun

Example: Lactic acid builds up during intense workouts.

Category: Science › Biochemistry

Meaning: a type of bacteria used in fermentation

Part of speech: noun

Example: Lactobacillus is found in yogurt.

Category: Science › Microbiology

Meaning: A unit of measurement for speed relative to the speed of sound.

Part of speech: noun

Example: The plane flew at Mach 2.

Category: Science › Physics

Synonyms: speed

Meaning: The whole universe or a large system.

Part of speech: noun

Example: The macrocosm of the universe is vast.

Category: Science › Cosmology

Synonyms: universe

Meaning: a prefix meaning one billionth

Part of speech: prefix

Example: A nanometer is one billionth of a meter.

Category: Science › Measurement

Meaning: a unit of length equal to one billionth of a meter

Part of speech: noun

Example: The wavelength of light is measured in nanometres.

Category: Science › Measurement

Meaning: one billionth of a second

Part of speech: noun

Example: The computer processes data in nanoseconds.

Category: Science › Time

Meaning: the science of manipulating matter on an atomic or molecular scale

Part of speech: noun

Example: Nanotechnology is used in medicine and electronics.

Category: Science › Technology

Meaning: able to be seen or noticed

Part of speech: adjective

Example: The changes in the environment are observable.

Category: Science › Observation

Synonyms:

• visible
• noticeable

Antonyms:

• invisible
• unnoticeable

Meaning: the amount of material in a given volume

Part of speech: noun

Example: The packing density of the boxes was high.

Category: Science › Physics

Synonyms: bulk density

Meaning: discrete quantities of energy or matter

Part of speech: noun

Example: Photons are considered quanta of light.

Category: Science › Physics

Meaning: to measure or express the quantity of something

Part of speech: verb

Example: It's difficult to quantify the impact of climate change.

Category: Science › Measurement

Synonyms: measure