Salt Water vs Fresh Water
CONCEPTUALDescribe and graph the amounts of salt water and fresh water in various reservoirs to provide evidence about the distribution of water on Earth
Mastery Evidence
- State that about 97% of Earth's water is salt water in the oceans
- Describe where fresh water is found: glaciers/ice caps, groundwater, rivers, lakes
- Create or interpret a graph showing the relative amounts of salt water vs fresh water
Assessment Prompt
“Can [child] explain that most of Earth's water is salty ocean water, and only a tiny fraction is the fresh water we drink, and show this on a graph?”
Curriculum Standards1 alignment
5-ESS2-2Next Generation Science Standards (NGSS) K-5codes onlyPrerequisites3
- Oceans & ClimatesoftAges 9—11
- Where water is found on EarthhardAges 7—8
- Representing numbers with objects (age 8+)softAges 8—9
Show full prerequisite tree
- Where water is found on Earth soft
Five oceans builds on curriculum concept of where water is found on Earth
- Shapes of land and water hard
Must know land and water features before learning where water is found on Earth
- Days, Weeks, Months & Years soft
Observing and describing seasonal changes requires basic date and time vocabulary (months, seasons, year)
- Ordering Events in Time hard
Understanding days/months/years builds on sequencing events chronologically
- Heating & Cooling Changes soft
Understanding state changes supports knowing water as solid (ice) and liquid
- States of Matter Vocabulary hard
Describing and measuring changes of state requires solid/liquid/gas vocabulary and the term 'change of state'
- Drawing Particle Diagrams hard
Observing and describing change of state requires reading particle diagrams showing how arrangement changes on heating or cooling
- Weather vs Climate soft
Ocean-climate connection benefits from understanding weather vs climate distinction
- Seasons & Weather Patterns soft
Climate as long-term patterns benefits from knowing seasonal patterns
- Days, Weeks, Months & Years soft
Observing and describing seasonal changes requires basic date and time vocabulary (months, seasons, year)
- Ordering Events in Time hard
Understanding days/months/years builds on sequencing events chronologically
- Geography & Local Weather hard
Climate concept requires knowing that different places have different typical weather
- Days, Weeks, Months & Years soft
Observing and describing seasonal changes requires basic date and time vocabulary (months, seasons, year)
- Ordering Events in Time hard
Understanding days/months/years builds on sequencing events chronologically
- Tides, Waves & Currents hard
Ocean-climate connection builds on knowing about currents and evaporation
- Whales & Dolphins Are Mammals hard
Classifying marine mammals vs fish builds on whale/dolphin are mammals concept
- Ocean Animal Variety soft
Food chains benefit from knowing the variety of animals that eat each other
- Ocean Animal Variety hard
Understanding zones requires knowing ocean has diverse life at different depths
- Changing Environments soft
Ocean ecosystems concept enriched by curriculum concept that environments change
- Habitats & Basic Needs hard
Must understand how habitats support organisms before understanding what happens when they change
- Where Are the Poles? soft
Polar regions enrich the curriculum habitats topic (exploratory age 5 -> curriculum age 6)
- Habitat Vocabulary hard
Describing how habitats provide for basic needs requires habitat, environment, conditions, shelter vocabulary
- What Is a Rainforest? soft
Rainforest habitat knowledge enriches the curriculum habitats topic (exploratory age 5 -> curriculum age 6)
- What Living Things Need hard
Must know basic needs of organisms before understanding how habitats provide for those needs
- Living Things Vocabulary soft
Describing what plants and animals need to survive uses life processes vocabulary: nutrition, growth, sensitivity
- Living, Dead & Never Alive hard
Must distinguish living from non-living before understanding habitats that support living things
- Living Things Vocabulary hard
Comparing living, dead, and never-been-alive things requires the life processes vocabulary to give reasons
- Common minibeasts: naming and recognising hard
Must recognise common minibeasts before exploring where each type lives
- Simple Food Chains soft
Food chain knowledge helps understand knock-on effects of environmental change
- Herbivores, Carnivores & Omnivores hard
Must know carnivore/herbivore/omnivore to understand food chains
- Habitats & Basic Needs hard
Must know about habitats and interdependence before learning food chains
- Where Are the Poles? soft
Polar regions enrich the curriculum habitats topic (exploratory age 5 -> curriculum age 6)
- Habitat Vocabulary hard
Describing how habitats provide for basic needs requires habitat, environment, conditions, shelter vocabulary
- What Is a Rainforest? soft
Rainforest habitat knowledge enriches the curriculum habitats topic (exploratory age 5 -> curriculum age 6)
- What Living Things Need hard
Must know basic needs of organisms before understanding how habitats provide for those needs
- Living Things Vocabulary soft
Describing what plants and animals need to survive uses life processes vocabulary: nutrition, growth, sensitivity
- Living, Dead & Never Alive hard
Must distinguish living from non-living before understanding habitats that support living things
- Living Things Vocabulary hard
Comparing living, dead, and never-been-alive things requires the life processes vocabulary to give reasons
- Common minibeasts: naming and recognising hard
Must recognise common minibeasts before exploring where each type lives
- Ocean Animal Variety soft
Food chains benefit from knowing the variety of animals that eat each other
- Minibeasts in the food chain soft
Garden minibeast food chains provide concrete examples for curriculum simple-food-chains
- Common minibeasts: naming and recognising hard
Must know common minibeasts before placing them in food chains
- Rainforest Animals soft
Rainforest animals provide rich examples for simple food chains (exploratory age 5 -> curriculum age 6)
- Habitat Vocabulary soft
Discussing how environments change and pose dangers uses habitat and conditions vocabulary
- Where water is found on Earth hard
Must know where water is found before graphing salt water vs fresh water distribution
- Shapes of land and water hard
Must know land and water features before learning where water is found on Earth
- Days, Weeks, Months & Years soft
Observing and describing seasonal changes requires basic date and time vocabulary (months, seasons, year)
- Ordering Events in Time hard
Understanding days/months/years builds on sequencing events chronologically
- Heating & Cooling Changes soft
Understanding state changes supports knowing water as solid (ice) and liquid
- States of Matter Vocabulary hard
Describing and measuring changes of state requires solid/liquid/gas vocabulary and the term 'change of state'
- Drawing Particle Diagrams hard
Observing and describing change of state requires reading particle diagrams showing how arrangement changes on heating or cooling
- Representing numbers with objects (age 8+) soft
Graphing water distribution builds on maths data representation skills
- Pictograms and tally charts hard
Constructing simple pictograms/tables is prerequisite to scaled versions
- Pictograms and tally charts (age 6+) hard
Constructing pictograms, tally charts, and bar charts requires these display vocabulary terms
- Sorting into categories hard
Constructing pictograms and tally charts requires classifying and counting objects first
- Comparing groups: more or fewer soft
Sorting categories by count benefits from ability to compare quantities
- Counting objects to 20 soft
Counting a set helps when comparing groups, but younger children (GB age 4) can compare using matching without formal counting to 20
- One-to-one counting hard
Cardinality principle builds on one-to-one correspondence — you must count correctly to know the last number tells 'how many'
- Counting objects to 20 hard
Counting objects in each category requires being able to count sets of objects
- One-to-one counting hard
Cardinality principle builds on one-to-one correspondence — you must count correctly to know the last number tells 'how many'
- Sorting Data into Categories soft
Data representation formats (pictograms, tally charts) support organising data
- One-to-one counting hard
Cardinality principle builds on one-to-one correspondence — you must count correctly to know the last number tells 'how many'
- Pictograms and tally charts (age 6+) hard
Organising and representing data requires data, tally, frequency, and category vocabulary
- Sorting into categories hard
Organising data in categories builds on classifying and counting objects in categories
- Comparing groups: more or fewer soft
Sorting categories by count benefits from ability to compare quantities
- Counting objects to 20 soft
Counting a set helps when comparing groups, but younger children (GB age 4) can compare using matching without formal counting to 20
- One-to-one counting hard
Cardinality principle builds on one-to-one correspondence — you must count correctly to know the last number tells 'how many'
- Counting objects to 20 hard
Counting objects in each category requires being able to count sets of objects
- One-to-one counting hard
Cardinality principle builds on one-to-one correspondence — you must count correctly to know the last number tells 'how many'
- Pictograms and tally charts (age 6+) hard
Drawing scaled bar charts and pictograms requires axis, scale, label, and frequency vocabulary
- Sorting Data into Categories hard
Drawing picture/bar graphs extends organising and representing data
- One-to-one counting hard
Cardinality principle builds on one-to-one correspondence — you must count correctly to know the last number tells 'how many'
- Pictograms and tally charts (age 6+) hard
Organising and representing data requires data, tally, frequency, and category vocabulary
- Sorting into categories hard
Organising data in categories builds on classifying and counting objects in categories
- Comparing groups: more or fewer soft
Sorting categories by count benefits from ability to compare quantities
- Counting objects to 20 soft
Counting a set helps when comparing groups, but younger children (GB age 4) can compare using matching without formal counting to 20
- One-to-one counting hard
Cardinality principle builds on one-to-one correspondence — you must count correctly to know the last number tells 'how many'
- Counting objects to 20 hard
Counting objects in each category requires being able to count sets of objects
- One-to-one counting hard
Cardinality principle builds on one-to-one correspondence — you must count correctly to know the last number tells 'how many'
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