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National Science Bowl® practice · Grades 6–8

Science Bowl practice that feels like the real thing

NSB-style questions on the exact topic your student is working on, across all six categories. Practise one topic at a time, see what was missed, and go again.

Start practising See how it works
BiologyCell structureApply
A cell from a leaf and a cell from a human cheek are compared under a microscope. Which structure would be found in the leaf cell but NOT in the cheek cell?
A. Nucleus
B. Mitochondrion
C. Chloroplast ✓
D. Cell membrane

Example question. Every answer comes with a short explanation.

All six NSB categories

Pick a category, then a topic within it, or type your own. Questions are written for middle school, at the depth you choose.

Biology

Cells, genetics, ecology, the human body, evolution.

Chemistry

Atoms, the periodic table, reactions, acids and bases.

Earth and Space

Rocks and minerals, plate tectonics, weather and climate, astronomy.

Energy

Energy forms and transfer, renewable and nuclear energy, electricity.

Math

Number theory, pre-algebra and algebra, geometry, probability.

Physics

Motion and forces, waves, light and sound, circuits.

How it works

From choosing a topic to knowing what to review, in a few minutes.

1

Choose a topic

Select National Science Bowl, a category and the topics to cover. Add your own topics on top of the suggested ones.

2

Practise

Answer a fresh set of NSB-style questions. Pick the depth: quick recall, applying ideas, or harder multi-step questions.

3

Review what was missed

See each answer with an explanation, track scores by topic over time, and practise the weak topics again.

Built to sit alongside your team's prep

Cofy doesn't replace the books, apps and sample questions your team already uses. It adds practice on exactly the topics you want.

Fresh questions every timeA new set on any topic, so students aren't memorising the same question bank.
Focused on your topicsCoaches and parents choose what to cover, down to a single subtopic.
Checked before it's shownEach question is checked for topic, grade level and answer before it reaches a student.
One place for all practiceNSB practice sits next to school-subject tests, quizzes and flashcards in one account.

Coaching a middle school team?

We're working with local Science Bowl teams on a pilot. Tell us how your team practises and the topics your coaches want to emphasise, and we'll shape Cofy around it.

Talk to us about a pilot Or try it yourself →

National Science Bowl® is a registered trademark of the U.S. Department of Energy. Cofy is an independent practice tool and is not affiliated with, sponsored by, or endorsed by the U.S. Department of Energy or the National Science Bowl. Practice questions are written by Cofy; they are not official NSB questions.